DSD1375S15 Diablo 7/8 in - 1-3/8 in 15 Step Drill Bit Diablo’s new Step Drill Bits bring exclusive technology to the Electrician, Plumber and HVAC contractor with fast, accurate cuts and increased stability in thin metals, PVC other plastic materials. The innovative Split Point Tip design enables a fast, on-point start resulting in increased durability and up to 4X longer life. An automated precision grinding process on each step reduces wear and delivers 2X faster cuts. Multiple hole sizes are made easy with laser etched step markings while increased step heights for common hole sizes makes drilling holes more efficient and faster. Designed with a ¼” hex shank, these bits are impact ready and can be used with drills and impact drivers.Split Point Tip (132°) makes pre-drilling obsolete and stays sharper longer resulting in increased speed, maximum durability and up to 6X longer lifeAutomated Precision CNC Grinding Process delivers strict angle tolerances on each step for minimal bit wear and 2X faster cuts in drilling and hole makingExclusive design delivers corded and cordless tool efficiency in high-speed mode for up to 75% more holes per battery charge1/4" hex shank allows use with drills and impact driversOptimized dual flute design for jam-free cutsIncreased step heights for easier drilling of common hole sizesEasy to read, laser marked steps for drilling holes of varying sizesIdeal for metal (up to 1/8” thickness), PVC and other plastic materialsIdeal for electrical, plumbing and HVAC contractorsIdeal For: metal (up to 1/8 in), PVC and other plastic materialsNUMBER OF STEPS : 15