adjustable dumbbells 55 lb dumbbell: 15~55lb dumbbell adjustable weight set adjustable dumbbell exercise fitness dumbbell for women man workout single fit sir 1. 1 second fast change weight: by gently turning the dumbbell handle handle, you can choose the multi weight dumbbells weight you need in one second. it is convenient and quick. 2. multi-level weight to choose: dumbbell set 5-55 have five weight selection levels to meet your needs for different dumbells weights adjustable weights. 3. safety lock system, stable and worry-free: the 8 lock slots make the 55 lb dumbbells set of 2 tray and dumbbells 55 lbs plates fit better, easier to extract out for usage and prevent the dunbell sets 25 plates from falling off. dumbbell weight is safe to usage and does not damage the floor. 4. one is enough to exercise the whole body. 25 pound weights dumbbells is suitable for women and man. a single compact dumbell is enough for exercises of the whole body muscles. 5. made of pure steel: the built-in hand adjustable dumbbells pair are made of pure steel, with the dumbells 55lb pair are wrapped in high-strength pp. adjustable dumbbell set of 2 are smooth and round without burrs. 6. easy to store and space saving. each bumbbell weight set of adjustible dumbbell set is exclusively made of round and stable pp material, with an high-density core dumbbells adjustable trays to prevent the adjustable dumbbells set of 2 from directly contacting the ground. this dumbell set 25 lbs pair tray protects the 25 lb dumbbell set, and also prevents the women's dumbell set from impacting the floor. adjustable dumbell sets saves 80% of storage space.