High Performance Diamond Core Drill Bit Tools Reaming Shell DCDMA Standard Thread

Anti - Wear Core Hole Drill Bits , NQ2 NQ3 HQ2 HQ3 Rock Core Drill Bits Product Feature :Rock Core Drill Bits Significantly outperforms the successful Series range in drilling speed and bit life. Protects the diamond from oxidation and surface degradation. Inhibits the premature "pull-out" of the diamond. Available in multiple standard configurations and selected on the basis of relative rock hardness and ground conditions" Advantages: Rock Core Drill Bits 1, The hard alloy