SPECIFICATIONS:\n Material: Tungsten Carbide Steel Alloy\n Surface : Nano Blue Coating/Titanium Coating\n Shank Diameter: 1/8'' (3.175mm) \n Cutting Diameter: 0.8-3mm, 3.175mm \n Cutting Length: 17mm\n Overall Length: 38mm\n\n WHAT\u2019S IN THE BOX?\n 10 x Spiral Flat Nose End Mills, 2-Flute\n 10 x Spiral Ball Nose End Mills, 2-Flute\n 10 x Nano Blue Coating End Mills (different cutting diameter: 0.8mm, 1.0mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm, 2.2mm, 2.5mm, 3.0mm)\n 10 x Titanium Coating End Mills (different cutting diameter: 0.8mm, 1.0mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm, 2.2mm, 2.5mm, 3.0mm)\n\nHigh Quality: The Genmitsu end mills are made of ultra-fine 0.2\u03BCm tungsten carbide steel alloy that can keep continuous machining 800 minutes. Moreover, its Nano Blue Coating /Titanium Coating with high hardness and heat resistance enables the tool's cutting edge to retain crucial sharpness and lubricity. This provides longevity and produces cutting results of the highest quality.\n2e