Knuckle bender coil spring

- 10 pieces.
- Designed to assist the intrinsic muscle weakness, e.g. with ulnar nerve palsy.
- The spring can also be turned upside down to increase the spring power.
- Torque at full finger extension: ca. 1000 g.cm
- Gauge 1 mm – 1/24″ – Coil diameter 4 mm – 1/6″

re this product.