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 can be run at speeds up to 6,000 RPM. It is made of solid carbide for wear resistance when cutting steel, iron, aluminum and other non-ferrous metals. This versatile square end mill is well-suited for slotting, side milling and contour milling applications.