| Rockbag : Handmaster Plus
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Description from Thomann :
- Ergonomically shaped softball for finger, hand or forearm muscle training
- Offers valuable muscle training for all musicians
- Suitable for use on both hands
- For training of fingers, hands and wrists and forearm muscles
- Strengthens flexor and extensor muscles, joints and the carpal tunnel
- System recommended and used by specialists worldwide
- Medium resistance / strength, red, special rubber strap for training the extensor muscles
- Includes 2 different rubber straps to adapt the Handmaster Plus to hand size and strength