... , hex, Torx hollow, Torx plus, tri-wing, etc.. Special heat-treated Product Name screw driver bitsBrand Namesun-alpsLength25-300MMSurface treatmentsandblasted, tin-coating, Cu ... in various kinds of Anchors, Screws, Bolts and Nuts, other special Architecture parts and Railway Parts. Our main markets include Europe ... us for more details.1, Our packing: 2, Our warehouse: screw driver bit