Daredevil, Nailkiller, 15/16" x 7-1/2", Short Auger Bit, Works In Wood, Tough On Nails, Dual Cutting Edges Deliver Easier Nail Cutting & Balanced Drilling, Open Faced Flute Offers Improved Chip Removal, Reinforced Tip Withstands Repeated Nail Hits, Reamer Edge Provides Improved Entry & Exit Hole Quality, 9X Life With Nail Hits, 1" Diameter, 4" Flute Length, 7.5" Length, 7.5" Overall Length, .4375" Shank Diameter, 7/16" Shank Size.