The gear mechanism makes the opening and locking operations particularly soft and silent. The shield of the cylinder is telescopic, which makes easier the paneling of the body, either with a thin panel or a thicker one. We supply, as standard equipment on the double sheeted body (as an extra on the single sheeted one), a high security cylinder (recodeable with two levels). A Property Card allows the duplication of the key just by showing it, in authorized centers. A testing KA cylinder is supplied. The lock is protected by a manganese shield.