Features and Benefits:Milwaukee shockwave impact duty #4 3/16 - 7/8 in. step bits are optimized for impact drivers drill/driver compatible give 5x longer life 2x faster holesOptimized for impact drivers drill/driver compatibleTitanium aluminum nitride (TiAlN) coating delivers 5x longer life than competitive impact step bitsRapid strike tip provides fast and accurate startsA dual spiral flute combined with the rapid strike tip delivers up to 2x faster holes than competitive impact step bitsOptimized shockzone reduces early shank breaks with global materials12-steps with laser engraving for clear stop on size identificationIncludes: (1) shockwave impact duty step bit #4 3/16 - 7/8 in.