The ASEC AS15 & AS19 Deadlocking Nightlatch is a robust double locking lever action night latch provided with two keys, each keyed differently. Designed for doors up to 57mm thick (54mm when paired with a cylinder pull), it is available in polished brass and satin chrome finishes. The lock features a choice of 40mm and 60mm backsets, and a compatible lockcase option for use with custom cylinders. Deadlocking is engaged by turning the key in reverse from the outside, ensuring enhanced security. Key cutting and workshop services are available on request.