This Dual Function Door Brace is perfect for use on all sliding and hinged doors and features and will not damage the door. This unit is designed to fit most doors and is adjusted with the press of a button. No tools are required. This unit will extend up to 46 inches. The not slip padded foot ensures a solid grip on most floor surfaces and is non-marking. The unit will collapse down to 31 inches to allow it to fit in most luggage. LIFETIME GUARANTEE