Threaded tool kit contains seven different sizes of M3 M4 M5 M6 M8 M10 M12 taps to meet your different needs. Spiral flute taps made of high speed steel, nitrided surface, rust and high temperature resistance, superior cutting performance. Spiral flute taps are very suitable for tapping and drilling, high precision and speed, improving your work efficiency and quality. Spiral flute design of the tap, fast upward chip evacuation and smooth cutting surface, suitable for tapping blind and deep holes. Widely used for tapping most low and high carbon steels, stainless steel, alloys, aluminum, copper, metal, wood, etc. Product Parameters: Color: black Material: High Speed Steel / HSS 6542 Surface: Nitride 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 Screw Pitch: 0.5mm, 0.7mm, 0.8mm, 1.0mm, 1.25mm, 1.5mm, 1.75mm. Length: 50mm, 56mm, 62mm, 71mm, 70mm, 80mm,86mm, Thread Diameter: 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm. Package Included: 7pcs Twist Taps