Daredevil, 9/16" x 17-1/2", Auger Bit, Easy 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 Hole & Exit Hole Quality, 9x Life With Nail Hits.