The Grainger Approved 3/64" Center Drill is a high-speed steel center drill with a plain shank. It has a 118 degree split point tip for accurate starting and clean holes. The drill diameter is 3/64" and the overall length is 2-1/2". The shank diameter is 1/8". This center drill is designed for use on mills, lathes, drill presses and CNC machines. It can drill through materials like alloy steel, cast iron, non-ferrous metals, plastics and wood. The plain shank allows use in chucks, collets or with an arbor. Made in the USA, this high quality center drill delivers accurate performance.