1308 plane PDC drill bit PDC core drill bit for engineering surveying

• DRILL DIAMETER (MM):2" to 8 1/2" (75 mm to 315 mm)
• TEETH:/ 6/ 8/ 10/ 12/ 14/ 16/ 18
• MATERIAL:PDC cutter, geological special steel
• BLADE:4-16 baldes
• 在线订购