Fixed Type Made of a phosphor bronze spring with a brass holder. A receptacle piece is mounted on the wall beside the door. When the door is fully opened, a clamp on the door catches on the receptacle and is held open. Screws (ø 4.1 mm x 8) used to install pieces. Swing Type Made of a phosphor bronze spring with a brass holder. Screws: ø4.1 mm x 8.