MX Select MX55 Adjustable Dumbbells The fitness industry's first and original rack and pinion design. The MX55 Adjustable Dumbbells are the ultimate ‘must have’ for the home gym. These adjustable dumbbells offer pro-style features you would expect from gym quality fixed dumbbells, including safety, durability and rapid weight selection. The pro-style design of the MX55 adjustable dumbbells is unmatched in the free weights market. Offering unmatched selectorized weight performance, the MX55 dumbbell’s sleek form and unique safety features inspire fresh confidence and interest from lifting enthusiasts. The MX55’s best-selling point is the way it feels in the hand, combined with the smooth operation of the locking rack and pinion system, you'll have seamless weight transition between reps. MX55 Features: Steel craftsmanship. Looks, feels and functions just like a pro-style dumbbell. Perfect balance. Length of weight shortens evenly each side, as less weight is selected. Quiet smooth operation. Changing weight does not involve handling the weight. No protruding knobs or ends. Selector dials recess into dumbbell collars after weight selection. Open handle design.Biomechanical and ergonomic precision. Unique rack and pinion design.Securely locks dumbbell weight plates into an immovable position Exceptional value. Price per pound is close to the average for most models Easy to handle. Dumbbell handset can be removed and replaced at 180 degrees Great for group training. The compact system allows for multiple sets in one room Patented design. U.S. Patent No. 10/166,427 MX55 Dimensions: Dumbbell weight range: 10-55 lbs in 5lb increments (4.5 – 24.9 kg in 2.25 kg increments) Equals the performance of a 10-piece dumbbell set Change weights with the turn of a dial Total weight with stand: 137.5 lbs (62.3 kg) Dimensions: at 55 lbs (24.9 kg): 15.94” long (40.5 cm) – end to end/out of stand at 15 lbs (6.8 kg): 9.58” long (24.3 cm) – end to end/out of stand Dimension of weight stack: Distance from outside of dumbbell handle to outside of weight – approx. 4” (10.2 cm) Dumbbell handle length: 5.21” (13.2 cm) (inside dimensions) by 1.125” (2.9 cm) diameter System footprint in stand: 18.74” L X 22” W X 30.675”H (47.6 cm L X 55.9 cm W X 77.9 cm H) MX55 Shipping: 5-7 days delivery lead time Ships in 3 boxes Resources: MX55 Selectorized Dumbbells Brochure