Greatdrillbit

Bi-center bit for Mining Machinery and abrasive formation

Single Cone Rock Roller Drill Bit for core barrel pilot bit

Tricone Drill Bit For Hard Rock with tungsten carbide insert

Three Cone Drill Bit For Soft Formation for water well drilling

Core barrel with high performance rock roller bit for Pile Foundation

Roller Bit

Rock Reamer Bits With Replaceable Roller Cone Bit