Bedside tray attaches without tools & includes thick felt on touch points. Reinforced 4mm thick metal clamp, with 3mm thick fluff pad to protect where you clamp on. Details Natural 16.93" x 11.61" x 2.2" Reinforced metal clamp can holds up to 26 lb. Larger and better shape of turning nob Wood Note: Make sure where you clamps on that is strong enough to handle the weight.