Use this device over other grip trainers to provide a more direct stimulus to the forearms whilst excluding the upper arms and shoulders. Compared to hangboarding the Heavy Roller distributes loads over the entire hand by putting much less strain on the fingers. This means you can keep training your grip strength off the wall and away from the hangboard. Check out our podcast with one of the founders of Beastmaker Dan Varian to hear more about training wrists.

Wrist training is used in many ways:
To increase strength in the wrist extensor/flexor muscles and improve stability whilst climbing. This typically decreases the amount of friction required to maintain contact with less positive holds and surfaces.
To add variety to a training plan and increase options for targeting grip strength.
Rehabilitation of wrist injuries: targets the affected area with a progressive load. (More convenient than a rack of dumbbells)
Rehabilitation of golfers/tennis elbow (tendonitis in the elbow), a common issue for climbers.