Bosch 21PC Black Oxide Bit Set

21 Piece, Black Oxide, Metal, Drill Bit Set, Set Consists Of: (2) 1/16", (2) 5/64", 3/32", 7/64", (2) 1/8", 9/64", 5/32", 11/64", (2) 3/16", 13/64", (1) 7/32", 15/64", (2) 1/4", 5/16", 3/8" & 1/2" Drill Bits, No Skate Tip For Clean & Accurate Starts, Black Oxide Coating Generates Less Friction, Three-Flat Shank Promotes Better Grip On Bits 3/16" & Larger, Universal Drilling Applications Designed For General Purpose Use, High Visibility Marking Provide Clearly Marked Diameter.