LIFTS & HOLDS MATTRESS: Just insert between mattress & box spring—IMPORTANT: Make sure there is a Boxspring for lifter to slide on and function. This device will not work with mattresses on a bed frame that have a lip or raised edge The inclined wedge separates and lifts the mattress as it is inserted between the mattress and box spring. This allows you with both hands free to make the. It also makes placing skirts so easy. made in the USA. LIFTS & HOLDS MATTRESS: Just insert between mattress & box spring—IMPORTANT: Make sure there is a Boxspring for lifter to slide on and function. This device will not work with mattresses on a bed frame that have a lip or raised edge