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Bq Nq Hq Pq Diamond Drill Bits. Customizable Design: Customized products available based on customer drawings or samples. Low Minimum Order: Minimum order quantity is just 1 piece for flexible purchasing. Fast Delivery: Normal production takes 7 days; standard products are in stock. Free Samples: Small value free samples provided at customer's delivery cost. Quality Assurance: ISO 9001 certified with 100% inspection and dedicated testing lab. Professional Expertise: Over 20 years of experience in diamond drilling tools and solutions. Advanced Manufacturing: World-class intelligent facilities including CNC and sintering machines. Reliable After-Sales: Timely communication and free replacement for manufacturer-caused issues.