Reach Adjustable Dumbbells replace an entire rack of weights in a compact design that fits into the corner of any room. The exclusive design of these adjustment plates lets you simply adjust the weight by holding the handle. Simply, turn the pointer to the corresponding number to adjust. Lock-lock structured design can ensure the weight plate doesn't fall off during exercise. Each dumbbell adjusts from 3 to 20 Kilograms. [ONE IS BETTER THAN FIVE]: Only with 1-set of dumbbell space, you can have 5-sets of dumbbell training experience with 80% space-saving. Super easy to use and store as it eliminates the need for multiple big clumsy dumbbells cluttering your workout space.