Roller Cone Drill Bits
High Carbon Steel
Well Drilling, Mining
Drilling Tool
Water Well Drilling , Oil Gas Drilling,Mining etc.
API 7 5/8 " Reg Pin or Customized
Rubber or Metal Sealed Bearing
IADC127/137/247/437/517/527/537/547/637 etc.
Soft to Hard Formations
Tungsten Carbide Inserts , Steel Tooth
Good Wear Resistance , High Strength etc. ,
Wooden Box or Carton