The MICRO 100 AEMM-100-4 metric, uncoated, 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 on soft materials requiring increased chip evacuation. MICRO 100 Solid Carbide Tools feature more than just a micro-grain of excellent quality. Their substrate is in a class of its own resulting from exclusive treating processes that allow for vastly 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.