The EZ Angle Roller with special frictioning rubber holds the desk at the desired angle. Equipped with a Clutchless Grip for easy height adjustment. The inner locking mechanism secures the desk at the desired height. To adjust the Clutchless Grip, push the upper shaft until a yellow switch appears at the base of the shaft. Twist, one click at a time; clockwise to loosen and counter-clockwise to tighten.