Features Durable and Corrosion Resistant: Spiral Flute Tap Set is made of good quality Ti plated high speed steel, durable and corrosion resistant, possess high hardness. Spiral Flute Designed: The tap adopts a spiral flute design, which is beneficial to remove debris and not easy to break. 9 Sizes From M2-M12: There are 9 different sizes of taps from M2 to M12, you can use to tap various threads. Stable Structure: Drill tap bits have stable structure, excellent performance and long service life. Excellent Thread Tool: Spiral flute tap is an excellent tool for creating threads, cutting or forming matched female threaded parts. Specification: Item Type: Spiral Flute Tap Set Material: Ti plated high speed steel Purpose: Used to create threads, cut or form matching female threads Specification:ModelWork length(approx.)Rod diameter(approx.)Total length(approx.)Recommended drilling(approx.)Tail  M2x0.4 11mm / 0.4in3mm / 0.12in 43mm / 1.7in 1.6mm / 0.06inCone M2.5x0.45 13.4mm / 0.5in3mm / 0.12in 47mm / 1.9in 2.0mm / 0.08inCone M3x0.5 13.5mm / 0.5in4mm / 0.16in 50mm / 2in 2.5mm / 0.1inCone M4x0.7 17mm / 0.7in5mm / 0.2in 57mm / 2.2in 3.3mm / 0.13inCone M5x0.8 19.5mm / 0.8in5mm / 0.2in 63mm / 2.5in 4.2mm / 0.17inCone M6x1.0 21.8mm / 0.9in 6mm / 0.24in 67mm / 2.6in 5mm / 0.2inCone M8x1.2523.75mm / 0.9in 6.5mm / 0.26in 71mm / 2.8in 6.8mm / 0.27inFlat M10x1.528mm / 1.1in 8mm / 0.31in 80mm / 3.1in 8.5mm / 0.33inFlat M12x1.7530.2mm / 1.2in9mm / 0.35in 89mm / 3.5in 10.3mm / 0.41inFlat Package List:9 x Spiral Flute Tap Note:Drill holes before use. Package List 9 x Spiral Flute Tap