Production and sales: Climbing cone, sleeve, finish rolled screw steel nut, high-iron nut, pad plate, connector, custom processing: nut, special-shaped nut, pre-stressed finish rolled screw bar anchor, lengthen and enlarge nut, high-iron sleeve, bridge nut, square nut, blind nut, ladder nut, screw, all kinds of special-shaped parts, custom-made all kinds of special-shaped tap, tapping special-shaped button. Welcome friends from all walks of life incoming sample to make to order