Sure-grip laptop deck with extendable rear and front sliding bracket ^^ No drilling- make sure the passenger seat rail is flat and the bolt is easily accessible and visible ^^ Heavy-duty telescoping aluminum tube (30mm) - can be easily adjusted from 14 to 21 ^^ Hand-control pan - allows to adjust tray vertically (180) and horizontally (360) ^^ Two quick-release levers and knob-screws allow users to adjust deck into the best viewing angels