Pin tumbler lock

Security lock is a term often used as a generic term for various locks with lock cylinder. The Duden defines security lock as " by a rotatably mounted in the housing, in the closed state but held by a plurality of pins cylinder specifically secured [ door ] closed. "

In general, for security locks several tumblers characteristic that must be individually brought to the lock code corresponding to the opening so that the bolt can be operated. A cylinder lock granted only significantly increased security when it has sufficient for the intended use of alarm systems and unlocking security, detection reliability, lock picking and key security. So-called " burglar-proof locks " are defined in Germany in the DIN standard 18251. The police Bavaria recommends using cylinder locks of classes four or five, which at a safety lock with multiple locking already locks the class would suffice three.