The MICRO 100 AEMM-055-4X metric, AlTiN - Aluminium Titanium Nitride coated, 4 flute, 30? helix, center cutting end mill. Designed and engineered as a universal application type end mill featuring a slightly increased flute and overall length for greater versatility. Conventional tool geometry supports applications in a wide scope of different materials ranging from soft to hard. . Each tool's cutting edge/tip has a distinctive mirror like finish that significantly adds to material removal while improving surface finishes. AlTiN coatings are high performance and versatile. Has a higher breakdown temperature while maintaining high surface hardness at elevated temperatures. This type of coating also promotes tool life and allows for faster feeds and speeds. Excellent for dry machining applications. Applicable with oxidation temperatures up to 800? C or 1450? F. AlTiN coatings are best suited for alloy steels, stainless steels, tool steels, nickel alloys and titanium. MICRO 100 Solid Carbide Tools feature more than just a micro-grain of excellent quality. Their substrate is in class of its own resulting from exclusive treating processes that allow increased speed and feed rates. For over 45 years, MICRO 100 is a known industry leader and internationally acclaimed when it comes to solid carbide tooling.