Adjustable dumbbell. Adjustable from 2 lb to 30 lb, in 4 lb increments: 2 lb, 6 lb, 10 lb, 14 lb, 18 lb, 22 lb, 26 lb and 30 lb. Helps tone muscle groups and improve core strength. Ideal for a variety of exercises at home or at the gym (aerobics, walking, step training). Space-efficient and flexible training option allowing to replace many dumbbells.