this is the back image of door locks made of zinc alloy, there are other ... different materials for your choice, Details for our door locksDetection Data of hardware accessory: Destructive power of ... stainless steel 202 corner fasteners,1pc zinc alloy lock,2pcs zinc alloy legs,1pc zinc alloy hinge, ... resistance, Chemical proof, Wear resistance, Firm, Crashworthy, Antibristletail and antibacterial.