Metal Drill Bit, Wood Drill Bit, Hex Shank Drill Bit manufacturer / supplier in China, offering Suborui 135 Degree Split Point HSS 3/16 Double Ended Centre Drill Bit Set for Hardened Metal Steel, Suborui Fully Ground High Speed Steel 135 Degree Split Point HSS Co Cobalt Double End Twist Drill Bit for Stainless Steel Metal Iron Drilling, Suborui 1/8 Titanium Heavy Duty HSS Cobalt Double Ended Rivet Drill Bit and so on.