This adjustable dumbbell set replaces 10 individual weights with one compact unit, offering a range from 5LB up to 25LB or 55LB per dumbbell so beginners and advanced lifters can train at their own level. A rotating dial lets you switch loads in about one second, and a dual safety lock keeps the plates firmly in place through lifts, drops and overhead movements. The textured non-slip metal handle provides a steady hold even with sweaty hands and fits both small and large grips. When not in use, the enclosed PP storage tray keeps the dumbbell organized and protects floors and furniture, while its compact footprint suits small apartments, home gyms or office workouts. Cast iron plates and a reinforced metal frame with a scratch-resistant, non-toxic coating stand up to daily training.