Concave easy return ball tooth bit
Q: Are you a manufacturer or trading company?
A: We are a specialized manufacturer.
Q: What are your main products, and used for?
A: Our products include core barrel, casing, drill rod, drill rig and other drilling parts.They are used for mineral exploration, geological drilling,
Q: How about the delivery terms?
A: 1.Payment: T/T, L/C, Western Union, Paypal, 30% deposit in advance and rest before del...