These locks are made of the best raw materials. Also, we offer lifetime guarantee on all locks to prove this claim. The latches of unique locks make from bablo, forehead is plated Iron and quadrilaterals is made by brass. The internal parts of these locks are made of galvanized sheets are ant erosion so it decreases concern for dear customers. Unique key lock is available in one size ( 6.5)and one color (silver). Also our unique locks could pass 72 hours salt spray test and got CE certification of Europe.