Yale Double Locking Nightlatch 60mm Dark Metallic B-1-DMG-SC-60 The Yale auto deadlock is a high security double locking nightlatch with internal lockable handle and automatic deadlocking. It is supplied with 1109 rim cylinder with anti-bump and anti-carding protection. The snib can be used to deadlock or hold-back the latch. The Yale auto deadlock is rated as high security and comes with a 2 year guarantee. Specifications Name: Yale P1 Auto Deadlock 92mm SKU: B-1-DMG-SC-60 Brand: Yale Deadlocking: Auto Deadlocking Nightlatch Options: Double Locking, Modern Style, Complete With Cylinder Backset: 60mm Number Of Keys: 2 Handing: Reversible Bolt Type: Latch Case Height: 88mm Case Width: 82mm Case Depth: 30mm Handle Projection: 20mm.