1.Dry wall screw 2.All sizes 3.Carbon steel 4.ISO9001:2000 5.OEM available dry wall screwbugle head, philips.Length: 11mm--152mmDiameter: 3.5mm, 3.9mm, 4.2mm, 4.8mm, 5.5mm, 6.3mmSurface Treatment: zinc pleted, gray phosphated or black phosphated.Tread: fine thread or corase thread.Material: carbon steel C1022,C1018Packing: 25kgs/box. 100pcs/box,500pcs/box, 12boxes/ctn, 8boxes/ctn or as your ...