A cylinder lock case with an automatically deadlocking latchbolt. The latchbolt is deadlocked when both triggering bolt and latchbolt are retained inside the lock case. The deadlocking is controlled by a snib in the forend. The lock case is fitted with at feature to prevent unauthorized use of the snib. The snib can be moved by turning first the key or thumbturn. Snib position: UP = Deadlocking, latchbolt protrudes 21 mm. The lock can be opened only with a key or a thumbturn. DOWN = Latchbolt protrudes 14 mm. The lock can also be opened with the lever handles. LC190X is the microswitch version of the lock. The switch changes it’s status when the latchbolt protrudes 21 mm. Following striker plates are recommended to be used with a microswitch locking box: 4692, 4693. Striker plate: 4690, 4691, LP711, LP714, LP721, LP731 Cylinder: ABLOY® C, N, T, U Fire resistance: Wooden doors EI115 - EI130 and EI215 – EI230, Metal doors EI115 - EI1120 and EI215 – EI2120 Mortise standard: OneFit mortise