... years supplier 3.ISO,SGS certification 4.Canon Machine Bolt A: SpecificationMaterial:stainless steel, aluminum,carbon steelSurface Finish: ... wishes from clients. We are not only offering good bolt products but also offering chipboard Screw, machine Screw , ... have modern facilities and quality control for Bolt process as, even better, other Bolt manufacturers. Therefore, Dongguan Jinri Metal Products ...