30'' Inches Tricone Roller Cone Hole Opener Drill Bit. Wide Diameter Range: Available in sizes from 6 1/2 inches to 72 inches for diverse drilling needs. Versatile Formation Adaptability: Suitable for soft, medium soft, hard, medium hard, and very hard formations. Customizable Color Options: Available in Blue or Red to meet specific visual requirements. High Wear Resistance: Features TCI or Steel tooth cutters with intensive palm tip welding for durability. Fast Drilling Speed: Optimized tooth design ensures high penetration rates and efficient drilling. Comprehensive Warranty: Includes a 1-year warranty covering mechanical defects. SGS and BV Certified: Manufactured with advanced technology and equipment meeting international standards. Rapid Stock Delivery: In-stock items can be shipped within 1 week of order placement.