Security lock case (comparable with security grade 5 according to EN 12209) for narrow profile doors. Operates with key from either side with a double cylinder or from outside with a cylinder and inside with a thumbturn or from one side only with a single cylinder. The key can only be removed when the hardened hookbolt is fully locked or retracted. Microswitch version. The switch changes its status when the hookbolt moves from unlocked to locked position. The lock case works with the 4655 striker plate.
