3M™ Adjustable Keyboard Tray AKT60LE, 17 inch Track Knob Adjust Arm. 3M™ Keyboard Trays are the ultimate solution for maximizing workplace comfort and productivity with the support you need and comfort you want. Economical arm design lets you set both height and tilt ( 15°/-15°) by loosening and tightening a single knob. Standard all-in-one keyboard platform holds both keyboard and mouse. Mousing surface can be positioned left or right. 17" track length is ideal for shallow workstations as well as desks with deeper mounting depths. Not compatible with corner workstations. Limited 5 year warranty.