DEWALT DW2100 4 Piece 3-1/2-Inch Power Bit Assortment Heat-treated to resist breakage & wear Uniquely designed to reduce stripping Shock-resistant tool steel for maximum durability Set Includes: Four 3-1/2" Bits, One #8 Flat, One #10 Flat, One #1 Phillips and One #2 Phillips . . . . .