The Micro 100 Drill Mill Carbide is a high performance carbide drill bit designed for milling and drilling operations in steels, cast irons, aluminum, and other non-ferrous materials. It features a 135 degree split point tip for reduced thrust and chatter-free cutting. The drill bit has a 1/8 inch shank diameter and is available in sizes ranging from #1 to 3/4 inch in 1/64 inch increments. It can machine up to 55 HRC materials. The Micro 100 drill is made of micro-grain carbide for strength, heat resistance, and tool life. It is manufactured in the USA.