Security lock (SFS 7020 grade 3 and comparable with security grade 5 according to EN 12209). Compatible with one-way rotating cylinders. Operates with key from either side with a double cylinder or from outside with a cylinder and inside with a special 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. The lock case works with the 4655 striker plate.
