The 3KS (3 curve system) is a reversible key system that distinguishes itself by virtue of its unique springless function principle. Unlike classic locking systems, locking elements in the 3KS cylinder move along the curves of the key under positive control, not pushed by spring force. This ensures the best wear resistance and picking protection. Thanks to the enormous number of possible variations, complex master key systems can be calculated and unusual lock authorisation requests can be fulfilled. 3KS cylinders in Euro profile are manufactured modularly, thus an on-site length adaptation can be made anytime.Cylinder Security: Picking protection , Drilling protection through hard metal , elements in the body and plug Pulling protection , Bump-key protection.