The Do it Best 21-Piece Titanium Drill Bit Set offers up to 3 times longer life with a titanium coating that reduces heat build-up and keeps the bits sharper. Designed with a 135-degree split point tip for a precision start with no walking and a stronger core to resist breaking, this set ensures fast, accurate drilling in a variety of materials. Includes: (2) 1/16", 5/64", (2) 3/32", 7/64", (2) 1/8", 9/64", 5/32", 11/64", (2) 3/16", 13/64", 7/32", 15/64", 1/4", 9/32", 5/16", 11/32", 3/8", in a convenient storage case.