screw driver bit Head types:PH, PZ, slot, Torx, square, hex, Torx hollow, Torx plus, tri-wing, etc.. Special heat-treated ... , Zn-coatingMaterial6150 ,8660 ,S2Hardress58-60Head typesPH, PZ, slot, Torx, square, hex, hex-plus, Z-spanner, Torx hollow, Torx plus, tri-wingpacking listIN ... more details.1, Our packing: 2, Our warehouse: screw driver bit