Diablo 7/8 in. to 1-3/8 in. 15-Step Drill Bit

Diablo step drill bits bring advanced technology to electricians, plumbers, and HVAC contractors for fast, accurate cuts and increased drilling stability. The innovative 132-degree split point tip initiates cuts quickly on contact, eliminating the need for pre-drilling while staying sharp longer for extended tool life. An automated precision CNC grinding process ensures strict tolerances on each step to minimize bit wear and provide significantly faster drilling. Designed for maximum efficiency, the optimized dual flute design prevents jamming and enables smooth material evacuation. Laser-etched step markings ensure accurate hole sizing, while increased step heights allow for smooth transitions between sizes. The 3/8 in. shank with three flats ensures a secure grip in drill chucks, preventing slippage during demanding applications in electrical, plumbing, and mechanical projects.