Metal Drill Bit, Wood Drill Bit, Hex Shank Drill Bit manufacturer / supplier in China, offering Suborui 10PCS 4mm Metric HSS M35 5% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal, Suborui New 10PCS 6mm M35 HSS Cobalt Metal Drill Bit Set for Hard Metal Stainless Steel, Suborui New 10PCS 8mm DIN338 Fully Ground 5% Cobalt M35 HSS Metal Steel Twist Drill Bit Set for Stainless Steel Hard Metal and so on.