The Micro 100 Center Drill is a 1/8 inch diameter high speed steel center drill with a straight shank. It has a 118 degree split point tip for accurate starting and fast penetration. The drill has an overall length of 2-1/2 inches and a shank diameter of 1/4 inch. It is designed for use on steel, cast iron, aluminum and other non-ferrous metals. The center drill features a bright finish for high visibility and has alignment flats on the shank for securing in chucks. Made in the USA, this quality center drill is rigid and balanced for chatter-free operation.