Automatically deadlocking lock for narrow profile doors. Primarily for doors which must always be latched (e.g. fire doors) and where deadlocking is needed. Function is determined by a sliding snib on forend: UP position = automatic deadlocking. Operates by a key (or a thumbturn) from either side. MIDDLE position = lock is latched and operates also with handles. DOWN position = not in use. Sliding snib is released only when turning the key (or thumbturn). LC305X is the microswitch version of the lock. The switch changes it’s status when the latchbolt protrudes 9 mm or more. Striker plate: 4613, 4614, LP702, LP703 Cylinder: ABLOY. C, N, T, U, SCAND Fire resistance EI115-EI160 and EI215-EI260