The Micro 100 Square End Mill Carbide is a high performance end mill designed for milling a variety of materials including steel, stainless steel, cast iron, aluminum, copper, brass, bronze, plastic and more. This square end mill features four flutes and a TiAlN coating for increased tool life and heat resistance. With a diameter of 1/2", shank diameter of 3/8", and overall length of 2-1/2", this carbide end mill provides excellent performance in light to heavy milling applications. The square shape allows milling of shoulders, slots, angles, and contours. Made in the USA, this high quality end mill is ideal for machine shops.