... 12, #14 (4)Surface: White, yellow Hex head self-drilling screw (1)C1022 material (2)Length 1/2 ... one of the leading manufacturer of hexagonal head self-drilling screws in this area Features: 1 ... E) Black phosphor F) Dacrotized Packing: Cartons, nylon bags, small box. Besides, we also produce ... such as drywall screw, chipboard screw, self-tapping screw, self-drilling screw, common nails, concreate nails ...