Product reviews for 3M Knob Adjust Keyboard Tray 

3M Keyboard Trays are the ultimate solution for maximizing workplace comfort and productivity with the support you need and comfort you want. Positive locking lever adjustment ensures tray height stays where you set it. Tilt adjusts 10° 15° with separate tab control. Standard all in one keyboard platform holds both keyboard and mouse. Mousing surface can be positioned left or right. 23 track length is ideal for corner workstations with 12 radius or 17 diagonal. Not compatible with shallow workstations. 360° swivel. Limited 5 year warranty.