Size:M3 M4 M5 M6 M8 M10. Specifications: M3 0.5 M4 0.7 M5 0.8 M6 1 M8 1.25 M10 1.5. Usage: 3-in-1 (punching---tapping--- deburring). High hardness, rustproof, solid and durable. Self-centering point, do not need assistant center drilling or center punching.
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