... ScrewMaterial:carbon steel, alloy steel, stainless steel, copper;Main Feature:with diamond point, bugle head, phillips drive, hardened, coarse/fine ThreadSize:all ... zinc coated,color zinc coated,blue zinc coated...Usage:Drywall screw do much less damage to wood and are easier to ... can pack as requiredWe can produce all kinds of drywall screw series products,if you have any related demand, please feel ...