Klein Tools KTSB15 Step Drill Bit #15 Double Fluted 7/8 to 1-3/8-Inch with Easy-to-Read Step Markings and Targets, 3/8-Inch Hex Shank

DURABLE COATING: Step bits are coated with aluminum titanium nitride, providing a durability that is 10 times greater than black oxide, ensuring an extended bit lifespan | CLEAN CUTS: Two straight flutes on this Step Drill Bit provide chip removal and cleaner cuts | SECURE GRIP WITH DURABLE HEX SHANK: The thick 3/8-Inch hex shank prevents rounding out in the drill chuck, providing a more positive grip and secure operation | LASER-ETCHED MARKINGS: High-visibility markings are provided for primary hole sizes, making it easy to identify the desired hole size and achieve accurate drilling | NON-WALKING DRILL TIP: The fast-starting, non-walking drill tip ensures precise and accurate drilling, allowing for clean and professional results