Hitachi 728240 1/4-inch x12-inch Auger Drill Bit 1/4-inch by 12-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" x12" Auger Bit 1/4" shank Precision design High speed steel Wood or Plastic