The Milwaukee Impact Step Drill Bit with a hex shank and size #3 (3/16"-3/4") is designed for durability and fast drilling. This bit features a Titanium Aluminum Nitride (TiAlN) coating that provides 5x longer life. The Rapid Strike tip ensures fast and accurate starts, while the dual spiral flute design allows for 2x faster holes. The optimized SHOCKZONE™ body reduces early shank breaks, making it ideal for use with impact drivers and drills.