Diablo Auger Bit Set (3-Piece)3 Piece Set Offers 30% in Saving Two step cutting action for precise, clean holes in wood drilling applications Dura Tip for extreme durability in nail embedded wood Dual cutting edge design for effortless, smooth hole drilling in nail embedded wood Deep flutes for fast chip removal 7 16 In. hex quick change shank increases stability and durability in cordless and corded impact wrenches and drill drivers Set features # of bits: 5 8, 3 4, & 1