IMPORTANT: The OnGARD door security brace ships with wood drill bit, 5 screws and phillips head bit driver. However If your floor is concrete - you`ll need to purchase concrete screws and a concrete drill bit. REMEMBER - ALL EXIT DOORS WITHIN YOUR HOME SHOULD HAVE AN OnGARD installed. URGENT NOTE: Bottom floor plate is a 1/2 inch in height. With that said make sure you measure from the bottom of your door to the floor surface as you will need a minimum of an 1/2 inch for the door to swing over the floor plate. Please watch installation video. RETURN POLICY: Customer pays for return shipping. The OnGARD is the strongest door brace available worldwide. (Testing Available) Security Products Magazine, awards the OnGARD Security Door Brace the Top Twenty Reader Choice Award. The unique residential door brace prevents violent invasions, stops burglars and looters in their tracks. Stops door kick-ins and even an attack from a battering ram. According to Jeffrey Dingle, a federal law enforcement trainer and former Director of Protective Operations for the Jimmy Carter Presidential Center: “the On The OnGARD is the strongest door brace available worldwide. (Testing Available) Security Products Magazine, awards the OnGARD Security Door Brace the Top Twenty Reader Choice Award. The unique residential door brace prevents violent invasions and stops burglars in their tracks. Stops door kick-ins and even an attack from a battering ram. According to Jeffrey Dingle, a federal law enforcement trainer and former Director of Protective Operations for the Jimmy Carter Presidential Center: “the OnGARD is a revolutionary security device. I personally inspected to guarantee its resilience amidst some of the harshest testing imaginable. “I violently beat against a OnGARD protected door with a 40-pound police battering ram to no avail. The revolutionary OnGUARD door brace is composed of a space-age polymer non rusting material (not metal) , the same compound found in U.S. fighter planes.