The Gripmaster hand exerciser is Prohands' signature model. It's ideal for anyone wanting to develop hand strength, including high-level athletes. Gripmaster offers athletes, seniors, or anyone wanting to improve grip and dexterity an opportunity to dramatically increase hand, wrist, and forearm strength.

Light- 5 lbs. resistance
Recommended for the average woman's hand and men preferring more repetitions at lesser resistance. 

Medium- 7 lbs. resistance
Recommended for the average man's hand.

Heavy- 9 lbs. resistance
Recommended only to those requiring exceptional grasping power for martial arts, climbing or weapon retention.