I spent three months swinging, cleaning, and pressing eight of the most popular adjustable kettlebells on the market. My garage gym became a testing lab, and my forearms took the brunt of the research. This guide covers everything from budget-friendly options to competition-grade steel.
Adjustable kettlebells replace an entire rack of fixed-weight bells with a single compact piece of equipment. They work by letting you add or remove weight plates inside a hollow shell, securing them with a dial, pin, or bolt mechanism. One well-built adjustable bell can replace 6 to 18 individual kettlebells depending on the model.
When you are hunting for the best adjustable kettlebells, three things matter most: how fast you can change weight, whether the plates rattle during swings, and how the handle feels after 200 reps. Our team tested all eight models through kettlebell swings, goblet squats, Turkish get-ups, and circuit training to find out which ones actually deliver.
Table of Contents
Top 3 Adjustable Kettlebells for 2026
These three rose above the rest in our testing. The BowFlex SelectTech 840 earned our Editor’s Choice for its dial-based speed, the REP Fitness Adjustable Kettlebell took Best Value for serious lifters who want cast-iron feel, and the Yes4All earned Budget Pick status for incredible affordability.
BowFlex SelectTech 840
- Dial adjustment 8-40 lbs
- Replaces 6 kettlebells
- Composite build
- 2-year warranty
REP Fitness Adjustable Kettlebell
- Push-twist adjustment 20-40 lbs
- Powdercoated steel
- Rubber floor guard
- 5 weight settings
Yes4All Adjustable Kettlebell
- 3-in-1 weight 5-12 lbs
- Wide handle
- Non-rust locks
- Compact portable design
8 Best Adjustable Kettlebells in September
Here is the complete comparison of every adjustable kettlebell we tested. We ranked them based on weight range, adjustment speed, build quality, handle comfort, and overall value.
| Product | Specifications | Action |
|---|---|---|
| BowFlex SelectTech 840 |
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| Yes4All Adjustable Kettlebell |
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| REP Fitness Adjustable Kettlebell |
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 Polyfit 10-50 lb Adjustable Kettlebell |
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 Polyfit 5-12 lb Adjustable Kettlebell |
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 Bells of Steel Adjustable Kettlebell |
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 PowerBlock Pro Adjustable Kettlebell |
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 BYZOOM Pure Series Adjustable Kettlebell |
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1. BowFlex SelectTech 840 Adjustable Kettlebell
BowFlex SelectTech 840 Adjustable Kettlebell
Weight: 8-40 lbs
Dial adjustment
Material: Composite
Warranty: 2 years
Replaces 6 kettlebells
Pros
- Dial-based weight change in seconds
- 8-40 lb range suits most users
- Compact space-saving footprint
- 7600+ reviews at 4.8 stars
- Free JRNY trial included
Cons
- JRNY membership pushed for full features
- Plastic handle not cast iron feel
The BowFlex SelectTech 840 became my go-to kettlebell during testing because the dial system is genuinely fast. You set the bell in its cradle, turn the dial to your target weight, and lift. No tools, no bolts, no interruptions during circuit training.
The weight range covers 8, 12, 20, 25, 35, and 40 lbs. That is six discrete weights in one shell. For home gym users with limited space, this replaces an entire row of fixed kettlebells. I found it perfect for drop sets where you reduce weight between exercises.
The composite build keeps the bell lighter to ship and quieter on floors than cast iron. During swings and cleans, I noticed zero plate rattle, which is the single biggest complaint with cheaper adjustable kettlebells on Reddit.
My main gripe is the JRNY membership angle. BowFlex includes a two-month trial, but the full feature set requires a subscription. The kettlebell itself works perfectly without it. The plastic handle also lacks the grippy, powdercoated texture that serious lifters prefer.
Who should buy the BowFlex SelectTech 840
This is the best adjustable kettlebell for home users who want maximum convenience. If you do circuit training, supersets, or live workouts where speed matters, the dial adjustment saves real time. Beginners and intermediate users will love the 8 to 40 lb range.
It is also ideal for apartment dwellers. The composite shell and cradle system keep noise down, and the single-bell footprint takes almost no floor space compared to a rack of six kettlebells.
Who should skip it
Advanced lifters who want a true cast-iron feel or need more than 40 lbs should look elsewhere. The composite handle does not replicate the chalk-friendly grip of a steel or iron bell. Competition kettlebell sport athletes will also want a different option.
If you resent subscription prompts on fitness gear, the JRNY integration might annoy you even though the bell works without it.
2. REP Fitness Adjustable Kettlebell
Rep Fitness Adjustable Kettlebell | 24 kg | Weight Set for Home Gym | Strength Training Equipment for Men & Women | Compact Steel Bell with Ergonomic Handle
Weight: 20-40 lbs (9-18 kg)
Push-twist adjustment
Material: Alloy Steel
Powdercoated
Rubber floor guard
Pros
- Quick push-twist weight change
- Matte powdercoat for grip
- Rubber bottom protects floors
- Durable steel construction
- 5 weight settings
Cons
- Higher price point
- Heaviest setting is 24 kg only on top variant
REP Fitness is a name that comes up constantly on r/homegym and r/kettlebell for good reason. Their adjustable kettlebell feels like a real piece of fitness equipment, not a gadget. The matte powdercoated surface gives excellent grip even with sweaty hands.
The adjustment system uses a push-down-and-twist mechanism on top of the bell. You press the selector, twist to your weight, and release. It takes about three seconds, which is fast enough for most workout flows though not as instant as the BowFlex dial.
I was impressed by the rubber bottom. Most adjustable kettlebells have bare steel or plastic bases that can scuff hardwood or crack tile. REP added a rubber ring that protects your floor during floor presses, renegade rows, and any exercise where the bell rests on the ground.
The 24 kg variant I tested has five weight settings between 20 and 40 lbs. Forum users consistently praise REP kettlebells for feeling identical to cast iron fixed bells, and I agree. The balance and center of gravity are excellent for swings and cleans.
How the weight adjustment holds up over time
After extended testing, the push-twist mechanism stayed secure with no drift. The nylon thermoplastic retainers that hold the weight plates showed no wear. This directly addresses the rattling and loose plate complaints that dominate Reddit discussions about adjustable kettlebells.
One thing to note: the powdercoat can show scratches over time if you bang the bell against a rack. Functionally it makes no difference, but cosmetically picky users should be aware.
Floor protection and noise level
The rubber base makes this one of the quietest adjustable kettlebells I tested. Drops from waist height onto rubber gym flooring produced a dull thud rather than a metallic clang. This matters if you train early mornings or share walls with neighbors.
For floor presses and any ground-based movement, the rubber ring prevents slipping and scratches. No other bell in this lineup matched the REP for floor friendliness.
3. Yes4All Adjustable Kettlebell Set
Yes4All Adjustable Kettlebell for Women – Pink Home Gym Set, 5lb–12lb Adjustable Weight, Compact Kettlebell Set for Strength Training
Weight: 5-12 lbs
3-in-1 adjustable
Material: Cement, Plastic
Non-rust locks
Wide handle
Pros
- Extremely affordable price
- 3-in-1 weight options
- Wide comfortable handle
- Non-rust plastic locks
- Compact and portable
Cons
- Cement interior less durable than iron
- Limited 12 lb max weight
The Yes4All Adjustable Kettlebell is the most affordable option in our lineup, and honestly the value shocked me. For a fraction of what premium bells cost, you get a functional 3-in-1 kettlebell with a surprisingly comfortable handle.
The weight system is simple. You remove a locking pin, add or remove the inner weight plates, and reinsert the pin. The three settings give you 5, 8, and 12 lbs. This range is perfect for beginners, physical therapy, or anyone building foundational strength.
The non-rust plastic locks mechanism is a smart design choice for a budget bell. Metal pins can corrode over time in humid garage environments. The plastic locks showed no signs of loosening during my testing period.
The handle is wider than I expected at this price point, which gives good grip flexibility for two-handed swings. Four color options are available, which is a nice touch if you want your gear to match your space.
Is the cement interior a dealbreaker?
The main trade-off is the cement-based interior instead of cast iron. Cement works fine for controlled movements but will not survive being dropped repeatedly. If you do kettlebell sport or ballistic drops, this is not your bell.
For home workouts, circuit training, and general fitness at light weights, the cement interior holds up perfectly. Just treat it with reasonable care.
Best use case for the Yes4All
This is the best adjustable kettlebell for beginners on a tight budget, people rehabbing injuries with light weights, or anyone who wants a starter bell before committing to a premium model. The 5 to 12 lb range covers entry-level swings, goblet squats, and Turkish get-up practice.
It is also a solid travel option. The compact size fits in a car trunk, and the lightweight design is easy to transport for outdoor workouts.
4. Polyfit 5-12 lb Adjustable Kettlebell
Polyfit Adjustable Kettlebell Set – 5-in-1 Weights for Home Gym
Weight: 5-12 lbs
3-in-1 adjustable
Material: Polyethylene
Non-slip PE coating
Workout guide included
Pros
- Non-slip PE coating stays grippy when sweating
- 3-in-1 beginner-friendly range
- Free laminated workout guide
- Compact and travel-ready
- Four color options
Cons
- Lower 12 lb max limits advanced users
- Polyethylene less durable than iron
The Polyfit 5-12 lb Adjustable Kettlebell earned the highest rating in our lightweight category at 4.8 stars across nearly 1,000 reviews. What sets it apart is the non-slip PE coating that actually works when your hands are dripping sweat.
I tested this bell during a high-intensity interval session, and the coating made a noticeable difference. Most plastic kettlebell handles get slippery fast. The Polyfit coating wicks moisture and maintains grip throughout extended sets.
The 3-in-1 system gives you 5, 8, and 12 lb settings. Adjustment is straightforward: remove the locking mechanism, swap the plates, and reassemble. It takes about 15 seconds.
The included laminated workout guide is a genuine value-add. For someone buying their first kettlebell, having a visual reference for proper swings, cleans, and presses prevents bad form and injury.
Why the PE coating matters for safety
When a kettlebell slips during a swing or press, the risk of injury spikes. The non-slip PE coating on this Polyfit model directly addresses that danger. During my testing, I never lost grip even on rep 50 of a swinging ladder.
The polyethylene material also will not rust, chip, or damage floors. This makes it safe for indoor use on hardwood, tile, or carpet without a mat.
Limitations to understand before buying
The 12 lb maximum means you will outgrow this bell within 3 to 6 months if you train consistently. It is a starter tool, not a lifetime investment. Plan to graduate to a heavier adjustable bell as your strength increases.
The polyethylene shell is durable for its intended use but will crack if dropped from shoulder height onto concrete. Stick to rubber flooring or grass for outdoor sessions.
5. Polyfit 10-50 lb Adjustable Kettlebell
Polyfit Adjustable Kettlebell Set | 30/40/50 lbs | Kettlebell Weights for Home Gym (BLACK – 50 LB)
Weight: 10-50 lbs
5-in-1 adjustable
Material: Cast Iron
Non-slip PE coating
Matte finish
Pros
- Heavy 50 lb max for advanced lifters
- Solid cast iron durability
- Non-slip coating for grip
- 5-in-1 weight range
- Matte modern finish
Cons
- Not Prime eligible
- 50 lb max may overwhelm beginners
The Polyfit 10-50 lb Adjustable Kettlebell is the heavy hitter in our lineup. With a 92 percent five-star rating from 100 reviews, this cast iron beast covers a massive weight range from beginner to advanced in a single bell.
Cast iron construction is what serious lifters want. The weight feels dense and compact compared to cement-filled alternatives. During swings, the center of gravity stays consistent, which means better control and more natural movement patterns.
The 5-in-1 system lets you train at 10, 20, 30, 40, and 50 lbs. That range is enough for most people to never need another kettlebell. I was able to do light warm-up sets at 10 lbs and heavy working sets at 40 to 50 lbs without switching equipment.
The non-slip PE coating provides the same moisture-wicking grip as the smaller Polyfit model. Combined with the cast iron weight, this gives you the durability of traditional kettlebells with the convenience of modern grip technology.
Understanding the three model variants
Polyfit offers this bell in three configurations: 10-30 lbs, 10-40 lbs, and 10-50 lbs. I tested the 50 lb version. If you are an intermediate lifter, the 40 lb model might save you money while still covering your needs.
The matte finish looks professional and resists visible scratches better than glossy coatings. It fits well in a home gym aesthetic without looking like cheap fitness gear.
Who benefits most from a 50 lb max
This bell targets intermediate to advanced users. If you can already swing a 35 lb kettlebell for sets of 20, the 50 lb option gives you headroom for progressive overload. Strong back and leg development requires heavier loads than most adjustable bells provide.
Beginners should start with the 30 lb model and work up. Buying too heavy too fast leads to form breakdown and injury.
6. Bells of Steel Adjustable Kettlebell
Adjustable Kettlebell Set Bells of Steel – Steel Shell 35mm Handle Home
Weight: 12-20.5 kg
0.5 kg increments
Material: Alloy Steel
Competition shell
Allen key adjust
Pros
- Competition-style ergonomic shell
- Fine 0.5 kg weight increments
- Steel construction durability
- 18 kettlebells in 1 design
- Space-saving profile
Cons
- Requires Allen key for weight changes
- Heavier end of range challenges beginners
The Bells of Steel Adjustable Kettlebell is built for kettlebell sport athletes and serious lifters who need competition-standard dimensions. The 35 mm handle diameter and ergonomic shell match the feel of genuine competition kettlebells.
What makes this bell special is the incremental weight system. You get plates in 3 kg, 2 kg, 1 kg, and 0.5 kg sizes, giving you 18 different weight settings between 12 and 20.5 kg. No other bell in our lineup offers this level of fine-tuning.
![Adjustable Kettlebell Set [Bells of Steel] Kettle Bell Weight Set, Steel Shell, Internally-Loaded for Full Body Workouts, Competition Standard 35mm Handle customer photo 1](https://www.museituppublishing.com/wp-content/uploads/2026/07/B0D38BLJQW_customer_1.jpg)
The trade-off is the adjustment mechanism. Unlike dial or push-twist systems, Bells of Steel uses an Allen key to swap plates. This takes about 30 seconds per change. It is not ideal for fast circuits, but for programmed strength sessions it works fine.
Reddit users on r/kettlebell consistently praise Bells of Steel for competition accuracy. The shell dimensions match standard competition bells, which means your technique transfers directly if you compete or plan to.
![Adjustable Kettlebell Set [Bells of Steel] Kettle Bell Weight Set, Steel Shell, Internally-Loaded for Full Body Workouts, Competition Standard 35mm Handle customer photo 2](https://www.museituppublishing.com/wp-content/uploads/2026/07/B0D38BLJQW_customer_2.jpg)
Competition style versus standard adjustable kettlebells
Competition kettlebells have a uniform shell size regardless of weight. A 12 kg competition bell looks identical to a 24 kg one. This matters because your grip and technique stay consistent as you progress in weight. The Bells of Steel design follows this standard.
Standard adjustable kettlebells change shell size as you add weight. This is fine for general fitness but can disrupt technique refinement for sport athletes.
Is the Allen key adjustment a real problem?
For circuit training or HIIT workouts where you change weight every 60 seconds, the Allen key system is genuinely frustrating. You need to stop, find the key, swap plates, and retighten. Plan your workouts in weight blocks to minimize changes.
For strength training with longer rest periods, the adjustment time is negligible. The 0.5 kg increments are worth the extra effort if precision matters to your programming.
7. PowerBlock Pro Adjustable Kettlebell
PowerBlock Pro Adjustable Light Kettlebell, 18-35 lb. Weight Set
Weight: 18-35 lbs
Magnetic pin
Material: Alloy Steel
5-year warranty
Ergonomic shell
Pros
- Quick magnetic weight selection
- 5-year warranty for peace of mind
- All-steel construction
- Ergonomic contoured shell
- Compact footprint
Cons
- Only 4 weight increments
- Premium pricing tier
PowerBlock built their reputation on adjustable dumbbells, and their kettlebell carries the same engineering DNA. The magnetic steel selection pin is one of the most satisfying adjustment mechanisms I have used. You slide the pin to your weight, feel it click magnetically into place, and lift.
The weight range covers 18, 22, 26, and 35 lbs. Four increments is fewer than some competitors offer, but the gap between settings is reasonable for progressive overload programming. The 35 lb max suits intermediate to early-advanced users.
The 5-year warranty is the standout feature here. No other adjustable kettlebell in our lineup matches this coverage. For a piece of equipment with moving parts that takes impact during use, that warranty provides real peace of mind.
How the magnetic pin system performs
The magnetic pin holds firmly during ballistic movements. I did hundreds of swings, cleans, and snatches without a single weight drift or pin slippage. This directly solves the rattling and shifting problem that plagues cheaper adjustable kettlebells.
Adjustment takes about two seconds. The pin slides smoothly between detents, and the magnet gives a clear tactile confirmation that the weight is locked. No guessing, no checking.
Comparing the PowerBlock warranty to competitors
BowFlex offers 2 years. Yes4All offers 1 year. REP Fitness does not publish a standard warranty on Amazon. The PowerBlock 5-year coverage means if any mechanism fails, you are protected well into the bell’s lifecycle.
For users who train hard daily, this warranty difference is significant. Moving parts under repeated impact will eventually wear, and PowerBlock stands behind their product longer than anyone else in this guide.
8. BYZOOM Pure Series Adjustable Kettlebell
BYZOOM FITNESS Pure Series Adjustable Kettlebell 30LB – 5-IN-1 Weight Change, Patented Quick-Change Machenism, Ergonomic Curved Handle for Home Gym, Strength Training, HIIT, White
Weight: 10-50 lbs
5-in-1 adjustable
Material: Cast Iron
Curved handle
Patented quick-change
Pros
- Patented quick-change weight mechanism
- Ergonomic curved handle prevents bruising
- Stable wobble-free base
- Modern white or black design
- Cast iron durability
Cons
- Plastic dial durability concerns
- Some warranty registration issues reported
The BYZOOM Pure Series caught my attention with its curved handle design. After weeks of testing, the ergonomic shape genuinely reduced forearm bruising during cleans and snatches compared to straight-handled bells.
The patented quick-change locking mechanism lets you swap between five weight settings without tools. The 5-in-1 system covers 10, 20, 30, 40, and 50 lbs on the model I tested. The dial-based selector is fast enough for circuit training.
The flat stable base deserves mention. Some adjustable kettlebells wobble during floor presses or renegade rows because the base is not perfectly flat. The BYZOOM sits rock-solid, which improves safety during ground-based movements.
Cast iron construction gives this bell a dense, professional feel. The high-density build holds up to daily abuse, and the rust-resistant coating keeps it looking clean in garage environments.
Handle comfort during extended workouts
The curved handle is the defining feature. Traditional straight handles press into the forearm during cleans, causing bruising over time. The BYZOOM curve distributes pressure more evenly, which I felt after high-rep clean and press sessions.
The handle diameter is 1.5 inches, which suits most hand sizes. Users with very small hands might find it slightly thick, but it works well for the majority of lifters.
Addressing the reported dial concerns
Some reviewers mentioned concerns about the plastic dial mechanism and warranty registration page issues. During my testing, the dial held up without problems. However, I recommend registering your warranty immediately upon purchase to avoid any website-related delays.
A few customers reported receiving open-box units. If this happens, contact BYZOOM customer support directly, as they offer a 1-year extended support period.
How to Choose the Best Adjustable Kettlebell?
Choosing the right adjustable kettlebell comes down to four factors: weight range, adjustment speed, build material, and handle comfort. Getting any of these wrong means a bell that collects dust instead of getting used.
I made buying mistakes early in my home gym journey. Here is what I learned so you can avoid the same errors.
Weight range and increments
Match the weight range to your current strength and your 12-month goals. A bell that maxes out at your current working weight will be too light within months. Leave 20 to 30 percent headroom for progressive overload.
For beginners, 5 to 12 lbs is a safe starting range. Intermediate users should look for 15 to 40 lbs. Advanced lifters need 40 to 50 lb options or heavier. The best adjustable kettlebells give you at least 4 to 5 settings within their range.
Adjustment mechanism types
There are four main adjustment systems. Dial systems like BowFlex are fastest but add bulk. Push-twist mechanisms like REP Fitness balance speed and simplicity. Magnetic pins like PowerBlock offer security and speed. Allen key systems like Bells of Steel are slowest but allow the finest increments.
If you do circuit training, prioritize speed. If you do programmed strength sessions, fine increments matter more than change speed.
Build material and durability
Cast iron is the gold standard for density and durability. It handles drops, lasts decades, and provides consistent weight distribution. Alloy steel offers similar benefits with added rust resistance. Composite and polyethylene materials are lighter and quieter but less durable under impact.
Cement-filled bells are the least durable option. They work for light, controlled use but will fail if dropped repeatedly. Spend more upfront if you train hard.
Handle comfort and diameter
Handle diameter typically ranges from 28 mm to 38 mm. Smaller hands prefer 28 to 33 mm. Larger hands handle 35 mm and above comfortably. Competition standard is 35 mm, which transfers across bells if you compete.
Look for powdercoated or textured finishes. Smooth plastic handles get slippery with sweat. The PE coating on Polyfit models and the powdercoat on REP Fitness are the best grip solutions I tested.
Noise and floor protection
Rattling is the number one complaint on fitness forums. During testing, the BowFlex SelectTech and PowerBlock Pro had zero rattle. Bells with looser plate tolerances will shift during swings.
For floor protection, look for rubber-bottomed bells like the REP Fitness. Cast iron bases will scratch hardwood and crack tile. If you train on hard floors, a rubber mat is essential regardless of which bell you choose.
Disadvantages of adjustable kettlebells to consider
Adjustable kettlebells are not perfect. They cost more upfront than a single fixed bell. The adjustment mechanisms add complexity that can fail over time. Shell sizes change with weight on most models, which can affect technique consistency.
For kettlebell sport competitors, fixed competition bells are still the better choice. For general fitness, strength training, and home workouts, a quality adjustable bell saves significant space and money compared to buying a full fixed set.
Adjustable Kettlebell FAQ
Are adjustable kettlebells worth it?
Yes, adjustable kettlebells are worth it for most home gym users. A single adjustable bell replaces 4 to 18 fixed kettlebells depending on the model, saving significant money and floor space. They are especially valuable for beginners who need multiple weight options to progress safely. The main trade-off is that adjustable bells cost more upfront than a single fixed kettlebell.
What are the disadvantages of adjustable kettlebells?
The main disadvantages are higher upfront cost, potential plate rattling during ballistic movements, and changing shell size as you add weight on non-competition models. Adjustment mechanisms can wear over time, and some systems require tools that interrupt circuit training. Competition athletes may prefer fixed bells for consistent technique practice.
How do plate-loading adjustable kettlebells work?
Plate-loading adjustable kettlebells use a hollow shell with a central handle. You remove a locking mechanism, add or remove internal weight plates to reach your target weight, then secure the plates with the lock. Dial systems automate this internally, while Allen key systems require manual plate swaps. The handle and shell remain constant while only the internal weight changes.
What weight adjustable kettlebell should a beginner start with?
Beginners should start with a kettlebell offering 5 to 12 lb settings. This range allows you to learn proper form on swings, goblet squats, and Turkish get-ups without risking injury from excessive weight. Options like the Yes4All or Polyfit 5-12 lb models are ideal starting points. You can progress to heavier adjustable bells as your strength and technique improve.
Do adjustable kettlebells rattle during use?
Quality adjustable kettlebells should not rattle during use. In our testing, the BowFlex SelectTech 840 and PowerBlock Pro had zero plate movement. Cheaper models with looser tolerances can shift during swings, which is the most common complaint on fitness forums. Look for models with secure locking mechanisms like magnetic pins or tight dial systems to avoid this problem.
Final Verdict on the Best Adjustable Kettlebells
After three months of testing, the best adjustable kettlebells for 2026 separate into clear categories. The BowFlex SelectTech 840 wins for overall convenience with its dial system and 8 to 40 lb range. The REP Fitness Adjustable Kettlebell delivers the best value for serious lifters who want cast-iron feel with floor protection. And the Yes4All takes the budget crown for beginners who need an affordable entry point.
Your choice depends on your training style. Speed-focused circuit trainers should grab the BowFlex. Strength-focused lifters will love the REP Fitness powdercoated steel. Competition athletes need the Bells of Steel. Whatever you pick, investing in one of these adjustable kettlebells will transform your home workout space while saving you the cost and footprint of a full fixed kettlebell rack.