Grip Block Gripper 24mm - Armlifting Pinching tool
Block gripper is interesting tool to train your grip/pinch finger strength. Mainly aiming the thumb muscles that usually are the weakest.
Triangular thin shape starting from 24mm to 12mm width. Easy on one side, more difficult and slippery on the other.
To finish product you need 50cm of 5mm rope and carabiner.