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Drywall screw →Material:Carbon steel C1022 →Diameter:19mm-100mm →Head:hex head →surface treatment:Zinc& Our advantages 1)China factory 2)productions with eight process:Drawing→Cold Heading→Drilling→Twist Wire→ Heat Treatment→Galvanized→Packing 3)Quality guarantee and Best price,good service →Quality Our strict quality control systerm ensures quality plan and specification are met during production. Ourmonitoring line includes the points as follwing, Length control, Diametercontrol, Unit weight test, Torque forcetest, drilling/tapping speed test, Some otherrelevant test if necessery. →Price On the basis of excellent quality, competitive price is also a vital point we are seeking for.And the best way we had found is efficient and effective completion of the work to reduce waste and reduce costs so that the interest of the clients. →Service With advanced management modes, we constantly improving our business operation ideas, and seeking development through honest operation and quality pursuing. With circumspect before and after services, we are sparing no efforts in establishing business relationship with our trade friends both at home and abroad