General description The Yale 85 Deadlocking Nightlatch (Model: YAL85DMGSC) is a highly secure front door latch designed for ease of use and reliability. It features a hardened case finish in Dark Metallic Grey and a satin chrome cylinder. This lock is key operated from the outside and lever handle operated from the inside, making it a popular choice for residential security. Technical specifications Model: YAL85DMGSC Finish: Dark Metallic Grey Cylinder Finish: Satin Chrome Backset: 40mm (measurement from the edge of the door to the center of the keyhole) Security Rating: High Supplied with: 1109 Cylinder Pack: Boxed Installation Locks with a 40mm backset are typically used in areas with restricted space, such as narrow glass panelled doors. Usage The latch automatically deadlocks when the door is closed. The snib function (bolt hold back button) allows the latch to be held back. The inside handle can be deadlocked by a reverse turn of the key, providing additional security (when