High Durability Button Drill Bits T38 70mm With Max Drilling Performance

T38 70mm Rock Drill Bits Drilling Tool Tungsten Carbide Bits Button Threaded Bit Description: Taper bit taper bit is mainly used with pneumatic rock drill and taper rod. It is connected with taper and drill rod for punching operation. It is mainly used for secondary crushing of mine, support of bolt and tunneling. And other fields. Threaded Drill Bits: As part of Prodrill’ stratagem that to make best effort to be the cost-effective leader for the drilling industry, we have a