Thumb Pump

GoldenGrip Verified independent store

→

This is a fun piece of training equipment to train the thumbs. It works quite simple: simply press the steel knob at the top down into the handle. Inside the handle, there's a spri ng that works as the resistance. The hook on the bottom can be used for easy storage. Specifications: Handle length: 10.5cm / 4.1inch Handle diameter: 3cm / 1.2inch Show more