Prime-Line Nickel Plated Finish Non- Mortise Style Bi-Fold Door Hinges 2-Pack N 7273These bi fold door hinges are constructed of steel and come in a zinc plated finish. They feature a non mortise design allowing them to be easily mounted on the doors edges, avoiding the need to chisel and mortise for installation. For best results, use a 3 32 in. bit to drill pilot holes prior to screwing in fasteners to avoid splitting wood. These door hinges are used on bi fold doors by a variety of wardrobe manufacturers. This Item Cannot be