3M™ Adjustable Keyboard Trays help place your keyboard and mouse at proper level to increase comfort and productivity. AKT65LE has a tool free installation knob adjust arm that controls both height and tilt - just loosen knob, set height and re-tighten. Adjusts height to 1.5” above mounting surface and 4.5” below mounting surface. Standard all-in-one platform with wooden construction minimizes bouncing. Includes all-in-one leatherette gel wrist rest with antimicrobial product protection and Precise™ Optical Mouse Pad that can be placed on right or left of keyboard. Lifetime warranty on arm, five years on platform, and one year on gel wrist rests. Contains 70% preconsumer recycled content. Black.