The Grainger end mill sets are high-quality carbide end mills for milling a variety of materials like steel, stainless steel, cast iron, aluminum, copper, brass, plastic and more. They come in sets of 2-10 pieces with diameters ranging from 1/8" to 1/2" and include 2, 3, 4, and 6 flute styles. The end mills feature TiAlN coating for heat and wear resistance. These end mill sets are manufactured in the USA by quality brands including Niagara Cutter and Accupro and are ideal for machine shops, metalworking, tool rooms, fabrication shops, and industrial manufacturing.