High Quality 3 Wingspdc Concave Drill Bit --Well Coal Mining

=== Base Info ===

• Model NO.：L-0109
• Type：Magnetic Drill
• Usage：Well Drilling
• Certification：ISO9001
• Color：Gold or as Customer Need
• Material：Carbon Steel, Diamond
• Number of Blade：Half or Whole 3-Wing
• Use：Coal Mining or Water Well
• Surface Treatment：Polishing
• Packing：as Your Request
• Advantage：High-Efficiency,Longer Life, Good Price
• Formation：Over Series 8 Formation
• Trademark：ZLONG
• Transport Package：10,PCS
• Specification：133mm
• Origin：Xi′an
• HS Code：6101961467

=== Description ===