... Good after-sale service5) free sample... Quick Details for double head screws in manufacturer in Foshan Type: ScrewsPlace of Origin: Guangdong ... "~4"Material: carbon steelHead CodeCSK, pan head, truss head, hexagon head, round head, oval head in cross recessed, combined, slotted, countersunk, flat, hex washer and so on.Finishing: Zinc ... colors are available.4. OEM are warmly welcomed. Double-end screw