StarTech.com Adjustable Arm Rest for Office Desk, Ergonomic Arm/Elbow Support, 360-Degree Rotation, Clamp-On/No Drill Installation - Arm Rest for office desk - Swivel motion for typing/scrolling - Ergonomic design - Reduced stress on shoulder/arm/wrist - 6-level height adjustment - 360-deg motion - Fully assembled - Clamp-on/no damage to desk; Desk thicknesses up to 2in (52mm)