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50mm High Quality Tapered Chisel Bits for Rock Drilling. Multi-Size Availability: Available in diameters from 28mm to 50mm for various drilling needs. Custom Color Options: Colors include Golden, Blue, Red, and other customized options. High-Quality Material: Manufactured from 35CrMoNiV alloy steel with high-grade tungsten carbide inserts. 48 Years Experience: Factory specialized in manufacturing drilling tools and spare parts for over 48 years. Advanced Manufacturing: Processed using state-of-the-art CNC machinery and mature welding technology. Global Certifications: Certified with ISO9001:2015 and SGS standards for quality assurance. OEM/ODM Service: Supports OEM and ODM services with 2 R&D engineers for custom solutions.