Rapidly drill into a variety of materials on the jobsite with 7/8 in. - 1-1/8 in. IMPACT READY® Titanium Nitride Coating Step Drill Bits. Designed to deliver long life and enhanced chip removal compared to previous models, each of the drill bits feature a special coating and dual flute spiral designs for dependable performance and durability. Speedy drilling is made possible by split point tips which are engineered for fast action. Drill with precision thanks to laser-engraved numbers on each bit for high step visibility.