... alloy 3.Finish: plating High quality, security for life High quality door safety chain Item No.HZL024DescriptionHigh quality door safety chainMaterialzinc alloySizecommon ... ' experience in stamping and die casting, is capable of tooling design & manufacturing, die casting, stamping manufacturing, ... more than 40 series of wall hooks, over-door hangers, stock hooks, hundreds of key rings, metal gifts, ...