The undermount keyboard tray comes with a spacer kit that allows it to be used for height adjustable desks and benching systems. The platform has mouse and keyboard palm rests that are interchangeable and can be attached on either side to accommodate right or left handed users. It has an articulating arm that is height adjustable with a tilt-angle adjustment and 360º glide track rotation. Product guaranteed by a 15 year warranty on the platform and a 2 year warranty on the palm rests.