Designed specifically to strengthen forearms and wrists. The adjustable tension allows you to customize your workout. Designed to strengthen the forearm, wrist, and fingers. Device is used to support your forearm and wrist for maximum safety and comfort, while you target train the identified muscles. Simple to use, just rock the wrist back and forth to build strength day by day. Great training tool to build hand and arm strength, definition, power and flexibility. This wrist exerciser is designed to improve strength, power and speed in the wrists, fingers and forearms, which is ideal for athletes, musicians, rock climbers, golfers and tennis players