Black Phosphate Drywall Screw Dia: #6-#14, 3.5-6.3 Length: 9.5-125, 3/8-5" Material: 1022 Surface: z/p, black Black Phosphate Drywall ScrewMaterial:carbon steel, alloy steel, stainless steel, copper;Main Feature:with diamond point, bugle head, phillips drive, hardened, coarse/fine ThreadSize:all different sizes such as 3.5x19mm,3.5x25mm,3.5x30mm,3.5x32mm,3.5x38...Finished:black phosphated,grey ...