... . Material:C1022,C1018,Stainless Steel 2.Surface treatment: zinc plated, Cr3+C Type 17 Chipboard Screw Product Feature:1. Standard: GB, DIN,ANSI, BS ... round head, combination round head, combination truss head, Phillips truss head, slotted truss head6. Drive: Phillips, pozi, slotted, hexagon, torx, square and so ...