The Cisa C3000 threaded cylinders offer the perfect balance between safety against attacks, protection against key duplication and fewer keys to manage accesses. The hardened steel 6 pin key bitting system ensure that the cylinder is drill resistant. It is suitable for use on mortice metal door locks. The Cisa C3000 threaded cylinder is supplied with 3 keys, fixing screw and a security card which can be used to control duplication of keys. The card should be presented in order to duplicate a key.