The 3M Adjustable Keyboard Tray MMMAKT60LE features a knob adjust arm that offers a tilt range of +15/-15 degrees, 360-degree swivel, and unlimited height positions. It includes a soft leatherette gel wrist rest with antimicrobial protection and a 3M Precise Optical Mousing Surface. The height adjusts 1 inch above and 4-1/2 inches below the worksurface, and the mouse can be mounted on either the left or right side. This keyboard tray is designed for standard workstations that can accommodate a 17-3/4 inch track and is made with 70% recycled content.