A must for any well-stocked garage or workshop! You get a standard 115-pc. titanium-coated high speed drill bit set along with 210 additional bits of the same quality — all the replacement bits youll ever need in the most popular sizes. For use in either 3/8in. or 1/2in. drills to bore into steel, wood or plastic.Includes (qty.) 327 Material High speed steel Diameter (in.) 1/16 - 1/2, A-Z Case Included Yes Additional Product Specs * 29 fractional bits, 1/16in. through 1/2in. * Number bits, #1 through #60 * Letter bits, A through Z