The 20kg Adjustable Dumbbell lets you change weights with the simple twist of a handle - no knobs to turn or levers to slide. With weights ranging from 2-20kg, all with a durable construction and a modern, lightweight aluminum cradle. Its a great way to get a workout done with varying weights - all from a smart, compact design. The twist-lock technology provides you with a natural dumbbell feel. There is no large clunky handle and permanent support system. As you go down in weight the dumbbell gets smaller in size thanks to the interior rod locking system.