RotaWrist Friction Unit

Plate positioning at the dinner table, paper steadying at a desk — wrist rotation does quiet, constant work, and the RotaWrist lets users set it passively with the sound hand or against the body. Friction holds the chosen position through the day's loads yet yields smoothly when repositioning, with no buttons or levers to find.

A tapered composite cone preloaded by an adjustable nut delivers the friction, serviceable in the field with a single wrench. The unit is anodized aluminum, 95 g, 14 mm added length, and threads to standard half-inch terminal devices with a lamination collar included for transradial sockets.