The Asec Kite BS Auto Deadlocking Nightlatch is a high security automatically deadlocking nightlatch which is ideal for use with solid and glass paneled wooden inward opening doors to provide additional security against forced entry. The latch deadlocks automatically upon closing, making the use of a credit card to force entry virtually impossible and requires a key to open from the outside. Furthermore, the internal handle can be locked from the inside rendering it inoperable. It has a snib on the inside which be used to hold the latch in a retracted position for convenience. This rim fixing nightlatch conforms to British Standard 3621:2004 (BS EN 12209) and the cylinder has over 30,000 cut key differs as well as featuring an integral cylinder pull which helps to protect the cylinder from being drilled. Supplied with fixings, keep and 3 keys.