Smart Dumbbell System

The Stronglock 4.0 is the perfect solution for anyone who wants to save space and exercise effectively. With just one adjustable dumbbell, you can cover the entire weight range from 4 to 25 kg and adjust the resistance in seconds. You also save valuable space in your home gym.

Weight Adjustment in Seconds

The Quick-Select technology allows you to adjust the weight in seconds. Simply turn the dumbbell handle, with no annoying connections or screws.

Smart Design

The unused weight plates are stored in the cleverly designed frame and easily slide back onto the dumbbell when needed.

Ergonomic Handle

Designed for a natural hand position, the dumbbell handle reduces hand fatigue and allows you to use it for longer periods without discomfort.