Hitachi 728220 7/8-inch x 6-inch Auger Drill Bit 7/8-Inch by 6-Inch auger drill bit with 3/8-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 7/8" x 6" Auger Bit 3/8" shank Precision design High speed steel Wood or Plastic