4190 Finnish Automatic deadlocking latchbolt

The deadlocking function is controlled with a rotating snib, operated by a square key, in the forend. Snib function:TURN CLOCKWISE : Deadlocking, latchbolt protrudes 21 mm.The lock can be opened only with a key or a thumbturn. TURN ANTICLOCKWISE : Latchbolt protrudes 14 mm. The lock can also be opened with the lever handles. 4190X is the microswitch version of the lock. The switch changes it's status when the latchbolt leaves its day locking position, i.e. the bolt protrudes 15 mm or more. Following striker plates are recommended to be used with a microswitch locking box: 4692, 4693.