3m Adjustable Single-Arm Lever-Free Keyboard Platform & Mouse Tray Adjustable Single-Arm Lever-Free Keyboard Platform Unique system keeps keyboard and mouse in position during adjustment or storage of tray. Independent mouse platform is height and tilt adjustable and can be mounted right or left. Patented gel wrist rests for keyboard and mouse; Precise™ optical mousing surface. Cord management. Center-mount extended arm provides excellent knee clearance and fine-tune adjustability; ideal for corner workstations. Lever-free height adjustment within 6-1/4" range. +/-15° tilt and 360° swivel. For standard and ergonomic keyboards. Meets American Physical Therapy Association requirements and ANSI/BIFMA specifications. Manufacturer's limited lifetime warranty. Workstation Type—Diagonal, curved, straight, 90° corner Glide Track Length—21" Tray Dimensions—19-1/2 wide x 10-1/2 long Wrist Rest Included Mouse Tray Dimensions—7 wide x 9-1/2 long Articulating Arm Height Adjustable (Above to Below Desk)—1" to 6" Sliding Tray