Amazon

Wrist Wrench - Fitter Gear

Perfect for arm wrestler and anyone wanting to strengthen their forearm and wrists: The arm wrestling handle is a systematic training tool, this circumference based resistance handle applies pressure in your fingers and wrist, designed to integrate the strength of your grip in balance with the strength of your wrist to help you strengthen not just the muscles in your hand, wrist and forearm, but the tendons and ligaments too.