7/16" x 18" Auger Bit * 3/8" shank * Precision design * High speed steel * Wood or Plastic * 7/16-inch by 18-inch auger drill bit with 3/8-inch shank diameter * Comes with a 30-day limited warranty * Ideal for wood, plastic and metal * Precision design creates less wobble in the drill and bit * Self-feeding tip and wide throat leave cleaner holes