A simple yet reliable latch for use in domestic applications along with well sprung door handles. Backset mm: 57.5. Corrosion Rating: 1 - Clean, dry & low humidity environments. Faceplate Size H x W mm: 59 x 27. Faceplate Type: Square. Finish: Nickel. Keep Size H x W mm: 56 x 27. Lock Case Depth mm: 79.5. Lock Case Height mm: 20. Lock Case Size H x D mm: 20 x 79.5. Lock Case Width mm: 15. Lock Follower Backset mm: 57.5. No. of CSK Screws: 4. Product Code: 675647. Rec Screw Dia. mm: 4.0. Rec Screw Gauge imp.: 8. Screw Size imp.: 8 x 1. Screw Size mm: 4.0 x 25. Screws Required Per Pair: 4. Size mm: 79.5 / 57.5.