Diameter: 1-3/8"Overall Length: 7-1/2"Flute Length: 4"Shank Size: 7/16"Bosch Daredevil Auger Bits Are Easy In Wood, Tough On NailsDual Cutting Edges Deliver Easier Nail Cutting And Balanced DrillingOpen-Faced Flute Offers Improved Chip RemovalReinforced Tip Withstands Repeated Nail HitsReamer Edge Provides Improved Entry And Exit Hole Quality