Diamond Drilling Tools - China Diamond Core Drill Bit ...
102mm/4 Inch Diamond Core Drill FOB Price: $10 - $30 Piece Min. Order: ... 3/4/5 Blades PDC Drag Drill Drilling Bit for Coal Mining or Water Well ... Min. Order: 2 Pieces . Product Description Femal thread 4 wing 75~270mm pdc concave drill bit 1. The steel body drill bit is mainly used for drilling soft -medium formation, such as mudstone, ...
Get Price