29Pc Cobalt m-35 Metal Index Drill Bit Set w/FREE Spiral Flute Screw Extractors Constructed of M-35 5 percent cobalt high speed steel for super abrasive resistance in tough metals . Cobalt steel extends cutting edge life and maintains cutting life after re-sharpening . Extra hard drill for greater wear . 135° split point tip starts on contact, cuts with less force . Reduced shank above 3/8 allows the use of larger drill bits in a 3/8 chuck . Rubber over-molded case protects kit if dropped . Tap & Drill selection chart for convenient reference . Automatic indexing for easy bit access and identification . Removable cartridges: easy to carry bits from case to worksite . Sizes include 1/16 to 1/2 in 1/64 increments. w/FREE 5 Pc. Spiral Flute Screw Extractor Set 3018002ES Yes -