National Hardware N336-180 MPB1920 Flush Bolt in Satin Nickel Designed to secure a door to a jamb on French, patio, wood, double or other doors Secures door to jamb on French, patio, wood, double or other doors Spring-action holds bolt in open or locked position Screw holes are countersunk for flush mount Manufactured of solid brass for maximum corrosion resistance Protective clear lacquer coating