
Underground Drill Bit 4 Blade 171mm Steel Body PDC Well Bit. Wear Resistant Material: Constructed from 45crnimov steel with forging process for superior durability. Customizable Color: Drill bit color can be customized based on customer requirements. ISO 9001 Certified: Certified under ISO 9001:2000 and ISO 9001:2008 standards for quality assurance. 1-Year Warranty: Comprehensive 1-year warranty coverage for mechanical defects. Sample Orders Accepted: Sample orders are welcome for quality testing before bulk purchase. Global Shipping Options: Flexible delivery via DHL, TNT, FedEx, air, sea, and train transportation. Professional Engineering Support: Expert geological engineers assist in selecting the right bits for specific strata. 100% Quality Inspection: All finished products undergo strict visual and functional inspection.