Our drill bits use a combination of:
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YG11C / YG15 tungsten carbide for tips (high hardness and toughness)
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42CrMo or 45# steel for bodies, heat-treated to improve impact resistance
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Anti-rust coatings (e.g., black oxide or zinc plating)
We also offer premium alloys or import-grade carbide upon request. All raw materials are tested with spectrometers and hardness testers, ensuring consistency and quality.