Pilot Hole Drilling 7 7/8 Inch TCI Tricone Bit

=== Base Info ===

• Model NO.：7 7,8 Inch
• API Reg Pin：4 1,2 Inch
• Color：Golden or as Your Wish
• IADC：537
• Bit Size：7 7,8 Inch 200 mm
• Trademark：superior
• Transport Package：Wooden,Plywood Case
• Specification：Tugsten Carbide Inserts
• Origin：Hejian, China
• HS Code：8207191

=== Description ===