Strengthens all 18 hand muscles in one easy exercise

Modern sEMG (surface electromyography) studies clearly illustrate that the ‘hand-opening muscles’ (extensors) act to stabilize the ‘gripping muscles’ (flexors) during all grip-related activities.

In other words, hand strength is dependent on the strength of both the flexor muscles AND the extensor muscles.

Handmaster Plus strengthens all 9 finger flexor muscles AND all 9 finger extensor muscles in one convenient exercise - no need for multiple training or rehabilitation devices.