6 3/4" API Rock Roller Tricone Bit for Water Well Drilling Sanmeul Drilling Tools Co., Ltd Base Info Model NO.：Tricone BitType：Impact DrillUsage：Well DrillingCertification：APITransport Package：Plastic Box , Carton BoxSpecification：CastingOrigin：China Description Pre：Thin Turbo Rim Diamond Blade for Porcelain Tiles Next：100mm 3A1 Dish Shape Resin & CBN Diamond Grinding Wheel for Stainless
