Door Stopper. 2-Pk Value Rubber Wedge. Works On All Surfaces. Plus 2 Flexible Spring Stop. SECURES THE DOOR FIRMLY. UberTuff Door Stoppers hold the door open for you while your hands are full with luggage, groceries, or tools. ALWAYS RELIABLE WITHOUT FAIL. This non slip stopper won't let the door hit you on your way out. Its pronounced top and bottom "teeth" help keep a firm grip of the floor and door. NO BRAINER, EASY-TO-INSTALL. Simply slide the rubber door wedge between the door and the floor until it is snug. Does a superb job of locking itself in. NON SKID DOOR STOPPER THAT WORKS ON ALL SURFACES & DOORS. Loves to work on most common household & office floor surfaces like hardwood, carpet, tile, concrete, and linoleum. BUILT TO FIT AND MADE TO LAST. Bigger than most door stops available, it is perfect for door and floor gaps of about 1.5 inches. Made of non-marking rubber that's easy on your floor but sturdy enough to ensure years of good use.