The Irwin 10232CB is a Cobalt #2 Unibit Step Drill Bit. Features: * 3/16-inch to 1/2-inch steps in 1/16-inch increments * 6X Longer life vs. the competition * M35 grade Cobalt HSS * Radial concave flute * 3-Flatted shank * Speedpoint tip What"s In the Box: * Irwin 10232CB #2 Unibit Step Drill Bit