The Micro 100 Square End Mill is a carbide end mill with a square end for milling slots, keyways, and pockets. It has a 1/2" shank diameter, 1" overall length, and a 1/4" cutting diameter. The end mill has 4 flutes and is made of solid carbide for wear resistance when milling steel, cast iron, aluminum, and other non-ferrous materials. This is a center cutting end mill suitable for plunge, slot, and pocket milling applications.