Norco Hand Exerciser
It’s easy to build hand strength with this economical hand exerciser.

For light resistance, loop a single rubber band around the top bar of the sliding finger grip. Attach additional rubber bands to increase resistance. Five rubber bands are included, each providing approximately 1.8kg of force.
For greater adjustability, the Deluxe Hand Exerciser is recommended. Two metal thumb screws allow for adjustments to the length of pull, accommodating different hand sizes and desired ranges of motion. The foam hand grip enhances comfort.
Note: The wider the hand, the greater the resistance.