Includes (qty.) 1 Diameter (in.) 9/16 to 1 Material High speed steel Additional Product Specs * Includes increments: 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16 and 1 (inches) * 3/8in. shank * Drills perfectly round holes in materials such as steel, brass, plastic and wood * Ideal for knockouts in electrical junction boxes and cabinets * Efficiently enlarges and deburs holes