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High Quality Drilling Bit Three Wings Inner Concave Non Core PDC Drill Bit. Extended Service Life: Lasts 10 to 30 times longer than normal carbide drill bits. Customizable Color: Available in Grey or customized colors based on requirements. High Efficiency Drilling: Features fast speed, high efficiency, and strong wear resistance. Versatile Applications: Suitable for coal mines, water wells, and complex rock formations. ISO 9001 Certified: Manufactured under strict ISO 9001 quality management standards. Durable Construction: Made from Alloy Steel, Diamond, and Carbide Alloy. Rapid Delivery: Ready to ship within 1 week if items are in stock. Free Sample Available: Some samples can be provided free of charge upon request.