Ningbo SD Metalwork Co.,Ltd is a professional Metalwork company and Dock Products Distributor in Ningbo,China, specializes in Fasteners, such as Bolts,Nuts,threaded Rods and Washers,with standard ANSI,ASTM,DIN,BS,ISO.etc,Stamping parts,Casting parts and CNC Machining parts,according to CAD drawing and samples. Welcome to the Custom Design