Each dumbbell adjusts from 5 to 52.5 pounds; adjusts in 2.5-pound increments up to the first 25 pounds. Each dumbbell adjusts from 2 to 24 kgs; adjusts in 1kg increments up to the first 5.5 kgs. Lets you rapidly switch from one exercise to the next. Combines 15 sets of weights into one, using a unique dial system. Eliminates the need for multiple dumbbells cluttering your workout space.