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Made from HSS 6542, treated with nitriding technique, up rust resistance.
Size: M3*0.5, M4*0.7, M5*0.8, M6*1.0, M8*1.25, M10*1.5, M12*1.75, standard coarse thread.
Spiral flutes, fast chip removal, can tap to the bottom of the blind hole.
Suitable for low-carbon steel, thin stainless steel, aluminium and so on, not for high hardness material such as High-Carbon Steel, etc.
Used on drilling machines, tapping machines, CNC and milling machines, not for hand electric drill.
Wolfride Spiral Flute Tap Set Metric and Standard Thread Tap Drill Bits M3 M4 M5 M6 M8 M10 M12 (7pcs)