N/a manufacturer / supplier in China, offering Colorful Carbide Steel Step Drill 1.3-4mm 14-20mm Step Countersunk Chamfering Drill Bit Counterbore Twist Step Drill, 3.175/4/5/6/8/10/12mm Dlc Coating CNC Router Bits Single Flute Carbide Milling Cutter for Aluminum, Carbide End Mill Twist Step Countersink Drill Bits for CNC Metal & Steel Tungsten Carbide Material and so on.