BS 3621 Nightlatch Door Lock

Types of door lock explained

British Standard High Security Nightlatch Door Lock

ERA BS3621 2007 Double Locking Nightlatch - 40mm SC 1830-35

Nightlatch, High Security, BS 3621, Key from Outside, Key Lockable Lever Handle from Inside - Häfele U.K. Shop

BS1 Max Security BS3621 Nightlatch, Insurance Approved

ERA BS High Security Nightlatch Brass Standard

Yale PBS1 BS3621 Cylinder Rim Deadlocking Night Latch

British Standard Security Night Latch 40mm Backset - Satin Chrome - Night Latches & Rim Cylinders - Locks & Security - Marches Architectural Ironmongery

Yale B-BS2-CH-CH-40, BS2 British Standard Nightlatch, 40 mm, Chrome Finish, High Security Approved by Insurance Companies

ERA 1930 BS3621:2007 High Security Nightlatch - Locks & Hardware Direct

Double Locking Nightlatch Door Lock