64mm T38 Top Hammer Drilling Thread Hard Rock Drill Bits Hard Rock Drill bits The hard rock drill bit is mainly used for blasting hole excavation of ....
Product Description 40mm 7 button hard rock drill bits for mining Drill bits are widely used in tunneling, mining, construction, stonework, transporta...
T38 R38 High Grade Tungsten Carbide Thread Button Drill Bit Thread button drill bits are made by high quality alloy steel bar and tungsten carbides. ....
High Wear Resistance Retractable Hard Rock Drill Bits Retractable rock drill button bit is well known for its high wear resistance on medium-hard to ....