Ulnar and Radial Flexion Training Tool
 
The Twist Yo’ Wrist trainer is a portable tool for developing grip strength, more muscular forearms, and wrist strength. Its design includes a 4” diameter roller and a four ft. long climbing-grade accessory cord. By winding up the cord and allowing it to unwind under control, the user can train both concentrically and eccentrically, working muscles from the elbows to the fingertips.