20 High Speed Twist Drill Bits & Organizer Great for Metalsmiths, Metal Working, Drilling & Organizing. This is a new set of 20 high speed steel twist drill bits. Great for drilling ferrous metals, tough casting sand forgings, working hardened stainless steel and other hard steels and tough high tensile strength nonferrous metals like titanium. Comes in a plastic stand with a clear domed lid. Sizes are stamped on stand for easy selection and storage of proper drill size. The stand measures approximately 1 15/16" x 1 7/8" (49 x 47.5 mm). These bits measure approximately 0.0135", 0.0145", 0.016", 0.018", 0.02", 0.021", 0.0225", 0.024", 0.025", 0.026", 0.028", 0.0292", 0.031", 0.032", 0.033", 0.035", 0.036", 0.037", 0.038" and 0.039" (0.34, 0.36, 0.4, 0.45, 0.5, 0.53, 0.57, 0.6, 0.63, 0.66, 0.71, 0.74, 0.78, 0.81, 0.83, 0.88, 0.91, 0.93, 0.96 and 0.99 mm).