The ERA Double Locking Nightlatch is ideal for replacing most existing front door locks. It automatically deadlocks when the door is closed, preventing retraction by a credit card. This nightlatch is particularly suitable for glass-panelled doors, as the handle can be deadlocked for additional security against forced entry. It features a non-handed design for both left and right-hand operation and is supplied with three keys. Available in standard (60mm) and narrow (40mm) backsets, and satin chrome, polished chrome, brass, and grey finishes. ERA has been a leading UK brand for home security products since 1838, with all products coming with a 10-year manufacturer's guarantee. It is designed to replace most existing front door locks and is ideally suited for solid and glass-panelled wooden doors. The internal handle offers added security against forced entry and can be deadlocked from the inside with the key. The bolt can be held in the withdrawn position using the snib feature, and the bolt cannot be reversed. Backset size: 60mm.