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The new TwistLock Adjustable Dummbells are the most space efficient and easy-to-use option available today – in fact no other adjustable dumbbell weight can be changed as quickly and easily as the TwistLock dumbbell!  With a weight range starting at just 5 lbs, this gives users of all fitness levels the opportunity to execute a wide range of exercises in the comfort of their own home without having to purchase the equivalent number of regular dumbbells. No knobs to turn, pins to align, or levers to slide – just twist and go!  The patented TwistLock cutting-edge technology allows quick and easy weight adjustments with the simple twist of each dumbbell handle.  You never have to take your hands off the dumbbell handles – simply place them into the dumbbell cradle and twist the handle…once the desired weight is shown in the readout window, you are ready to go!  For added safety, the TwistLock weight adjust system can only be made when the dumbbell is docked with the beautifully designed cradles (included) that hold the dumbbells.  Nobody wants oversized, bulky, odd shaped dumbbells getting in the way of your training.  That is why the StairMaster engineers and designers spent so much time analyzing gym quality, commercial style dumbbells – after all, that’s what you would prefer to workout with in your own home if you had the space and money to buy them.  They made sure the TwistLock design looked like a dumbbell, felt like a dumbbell and delivered results like a dumbbell.  Unlike many other adjustable style dumbbells on the market, the perfectly balanced TwistLock dumbbell delivers the same basic sizes as gym style dumbbells as you increase the weight…so whether you are using a 5 lbs or 50 lbs weight, the size of the dumbbell closely resembles the size of the same weight you would use in the gym.  The contoured and textured dumbbell handles provide a comfortable and secure grip during your workouts.  Taking up such a small amount of space, there is no longer an excuse not to own a complete set of dumbbells.  Specifically designed for the home environment, the patented TwistLock Adjustable Dumbbells incorporate numerous thoughtful features that were developed with your performance and comfort in mind. 

Product Features

  • Patented TwistLock Design allows fast and easy weight adjustment with the simple twist of the handle to keep your workouts effective and moving.
  • Handle Design starts at 5 lbs and is the most compact available.
  • Dual Sided Weight Selection Windows are highly visible and are located at each end of the dumbbell handle for quick and easy weight selection.
  • 5 lbs Starting Weight w/ 5 lbs Increments accommodates users of all fitness levels with a wide range of weight adjustment.
  • Soft Grip Handle is contoured and textured to provide a comfortable and secure grip.
  • Aluminum Weight Cradles are Included to provide easy access and secure storage of the dumbbells.  Plus with the open-end design of the cradles, they can be easily picked up and moved when needed. 
  • Durable Plate Design is engineered to last with over molded high impact plastic body.
  • Free Exercise Guide details 20 distinct dumbbell exercises enabling a total-body workout for users of all fitness levels.
  • Replaces 10 pairs of dumbbells equal to 550 lbs of weight.


  • Weight increments:  5, 10, 15, 20, 25, 30, 35, 40, 45, 50 lbs
  • Weight range:  5 to 50 lbs (2.2 to 22.7 kg) each dumbbell
  • Size range:  5 lbs (2.2 kg) starting weight is only 9.3” (23.6 cm) long, length increases with additional weight
  • Includes:  2 dumbbells, 2 cradles and exercise guide
  • Product dimensions (1-5 lb handle Only):  9.4” L x 3.5” W x 3.5” H (23.8 L x 9 W x 9 H cm)
  • Product dimensions (1-50 lb Dumbbell Only):  14.5” L x 7.9” W x 7.5 H (36.6 L x 19.8 W x 19.1 H cm)
  • Product dimensions (1 Cradle Only):  16” L x 9.1” W x 3.6” H (40.8 L x 23.2 W x 9.2 H cm)
  • Product dimensions (1-50 lb Dumbbell in Cradle): 16” L x 9.1” W x 8” H (40.8 L x 23.2 W x 20.3 H cm)
  • Product weight (2 Dumbbells with 2 Cradles):  103 lbs (46.8 kg)
  • Total shipping weight (2 Dumbbells with 2 Cradles):  108.7 lbs (49.4 kg)
  • Shipping info:  Ships in 2 cartons – each carton contains one dumbbell with one cradle


  • Parts:  2 years (Residential Use Only)

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Material Metal
Item Type Dumbbell
Total Weight 100.0 lbs.
Fitness Ball No
Setup Requirements Some assembly required
Individual, Kit or Set Pair
Total Weight - Dumbbell 100
Portability Portable
Stand Included No
Product Overview:
Item Weight (lbs.) 103
Overall Color Silver/black
General Warranty 2 years
Training Media Included Yes
Weight Range 26 or more lbs.
Materials & Finishes:
Finish Aluminum


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