Feature: 1. Excellent high speed steel, high hardness with good durability. 2. Nitriding coated surface for anti-rust effect. 3. Performed well in tapping, quick with high accuracy. 4. Spiral pointed design for simultaneous chip removal and tapping. 5. Suitable for machine and manual use, great for auto repair and machinery where metric threads are specified. 6. Include 7 size screw taps: M3/M4/M5/M6/M8/M10/M12 to suit your various needs. 7. Nitriding coated surface for anti-rust effect. Performed well in tapping, quick with high accuracy. Specification: A perfect spiral pointed tap set that does a perfect job in tapping metals, woods or plastics. They are different 7 sized spiral pointed taps for threading a circular tube, down rows of pins to suit your various needs. Features: Excellent high speed steel, high hardness with good durability. Nitriding coated surface for anti-rust effect. Performed well in tapping, quick with high accuracy. Spiral pointed design for simultaneous chip removal and tapping. Suitable for machine and manual use, great for auto repair and machinery where metric threads are specified. Include 7 size screw taps: M3/M4/M5/M6/M8/M10/M12 to suit your various needs. Specifications: Color: Black Material: High Speed Steel (HSS 6542) Surface Process: Nitriding Treatment Product Size(Metric): M3*0.5, M4*0.7, M5*0.8, M6*1.0, M8*1.25, M10*1.5, M12*1.75, Standard Coarse Thread Tap Screw Pitch: 0.5mm, 0.7mm, 0.8mm, 1.0mm, 1.25mm, 1.5mm, 1.75mm Length: 50mm/1.97", 58mm/2.28", 64mm/2.52", 72mm/2.83, 70mm/2.76, 80mm/3.15, 84mm/3.31" Thread Diameter: 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm Item Weight: 117g / 4.13oz Package Size: 8.5 * 3.5 * 1.5cm / 3.35 * 1.38 * 0.59in Package Weight: 119g / 4.20oz Package List: 7 * Spiral Pointed Tap Package List: 7 * Spiral Pointed Tap