Kensington 60718 Adjustable Keyboard Platform with SmartFit System, 21-1/4w x 10d, Black Unique modular platforms attach to arm as needed for different size keyboarding surfaces. Use all three platforms for a large mousing area or remove a platform to fit small desks. Adjusts 6" in height, +/- 15 degrees in tilt and rotates 360 degrees. Includes a keyboard wrist rest. 19" track, 11" arm for straight workstations. Easy color-coded window lets you adjust the unit instantly to your unique SmartFit comfort color. Adjusts 6" in height, +/- 15 degrees in tilt and rotates 360 degrees. Includes a keyboard wrist rest. 19" track, 11" arm for straight workstations. Easy color-coded window lets you adjust the unit instantly to your unique SmartFit comfort color. Unique modular platforms attach to arm as needed for different size keyboarding surfaces. Use all three platforms for a large mousing area or remove a platform to fit small desks.