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The best drill bits in China

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China National Accreditation Service for Conformity Assessment
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HSS Threaded Shank Step Drill

Mainly used in aviation, aerospace industry processing centers, robots to make stepped holes or precision reaming scenes with high concentricity requirements. The step drill type

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HSS Straight Shank Step Drill

Mainly used in aviation, aerospace industry processing centers, robots to make stepped holes or precision reaming scenes with high concentricity requirements. The step drill type

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