... Dacroment Plated,chromium plated,Tin plated,Black phosphating ,anodized ,Parkerising,and Environmental Plated is used in our products,Hexavalent chromium are ... plastic bag will be packing as per the Fasteners' size,and it will be Packed for each carton will be 22kg -25kg ... .When head become thicker,and then the socket is much deeper than some other manufacturers,it is convenient to tighten the ...