ecurity lock (security grade 3 according to EN 12209). The hardened hookbolt with intermediate locking positions is locked and retracted by turning the key 360°. The deadbolt protrudes 23 mm. Lock handing can easily be changed by pushing in the latchbolt and turning it 180°. The lock can be used with DIN standard fittings. The lock is applicable also for fire doors. Drilling protection 404252-B, is available as an optional accessory. 4272X is the microswitch version of the lock. The switch changes the status during the last key throw to the locking direction. Striker plate: LP760 R/L Cylinder: Euro DIN Fire resistance: Yes