Weissenfels's security chain and lock system is a unique product that provides an extremely high level of security. The chains are made of specially selected and proprietary alloy steels and are triple heat treated to provide the highest possible hardness and greatest resistence to cutting, prying, and striking tools. The "Titan" chains are made from a 3/8^ prime prime square bar, while the "Dragon" chains are made from a 7/16^ prime prime hexagonal bar stock. These bar stocks provide much higher resistence to cutting than traditional round bar stock used to make most chains.