Hitachi 728225 1/4-inch x 8-inch Auger Drill Bit 1/4-Inch by 8-Inch auger drill bit with 1/4-inch shank diameter Precision design creates less wobble in the drill and bit Self-feeding tip and wide throat leave cleaner holes Ideal for wood, plastic and metal Comes with a 30-day limited warranty 1/4" x 8" Auger Bit 1/4" shank Precision design High speed steel Wood or Plastic