Lockwood 002-3L1 Single Cylinder DeadlatchLockwood 002 3L1 Single Cylinder on the outside, Deadlatch with Lever handle and Metal Fire Frame Strike kit Suits 30mm 45mm fire doors 18mm latch projection stainless steel High security with cut resistant stainless steel bolt Tested in accordance with AS4145. 2 1993 Bolt hold back function activated by external key or internal lever Includes a metal frame strike for inward opening fire doors Can be keyed alike to other Lockwood door locks to order