The Handmaster Plus is a hand exerciser designed for strengthening the hand, wrist, and forearm muscles. The device consists of a foam ball and rubber exercise cords, which aim to strengthen the extensor muscles that open the hand and spread the fingers. The Handmaster Plus also exercises the fingers and thumbs through its full range of motion and provides a complete tennis elbow exercise. The product includes cords for large and small hands and three resistances are available. Illustrated exercises are also included. The Handmaster Plus is latex free.

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Source: Handmaster Plus