Deadlatches, Nightlatches and Deadlocks Lockwood Rimlocks are fitted by attaching the hardware directly to the surface of the door. Lockwood 001 Double Cylinder DeadlatchHigh security Deadlatch with Safety Release™ and LockAlert®. Lockwood 002 Single Cylinder DeadlatchHigh security general purpose single cylinder deadlatch. Lockwood 355 DeadlockHigh security general purpose double cylinder deadlock. Lockwood 303 DeadlockHigh security general purpose single cylinder deadlock. Lockwood 201 NightlatchIncludes inside snib. Opened by a key from outside and by… Lockwood 100 NightlatchOpened by key from outside and by turn knob inside. Lockwood 200 Narrow Stile StreamlatchOpened by key from outside and by turn knob inside. Lockwood 211 StreamlatchOpened by key from outside and turn knob inside. Lockwood 213 Streamlock DeadboltLocked or unlocked by key outside and by turn knob inside. Lockwood 507 Fire Rated NightlatchFire rated to 4 hours.