Double cylinder lock case with an automatically deadlocking latchbolt for emergency exit doors. Latchbolt protrudes 21 mm. The lock case has a double cylinder and an exit thumbturn. The lock can be opened with a key or an exit thumbturn. LC123X is the microswitch version of the lock. The switch changes it’s status when the latchbolt protrudes 15 mm or more. Striker plates to be used with a microswitch locking box: 4692, 4693. Striker plate: 4690, 4691, LP711, LP714, LP721, PL731 Cylinder: ABLOY. C, N, T, U Fire resistance: Yes