Case Star Black Adjustable Arm Wrist Rest Support Computer Desk Extender The KEERQI Arm support Made of strong ABS plastic. Soft surface pad provides extra comfort. Adaptable for right or left hand users, 180 Degree Rotated The KEERQI Wrist Support can be easily rotated 90 degrees out of way. No assembly required, easily attaches to a computer desk up to 4.8 cm (1.9in) thick