Size: forM3 0.5mm,M-4 0.7mm, M5 0.8mm, M6 1.0mm, M8 1.25mm. Tapping 3/4 turn after a quarter back feeling. Material: HSS. Material Composition: Crafted from high-speed steel, this tap set is designed for high wear and heat resistance, make sure longevity and consistent performance across multiple uses.
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