- Comprehensive Set : This pack includes 5 step drills, designed to meet various drilling needs. Drill #1 ranges from 3/16" to 1/2" with 6 levels, Drill #2 goes from 1/8" to 1/2" with 13 levels, Drill #3 spans 1/4" to 3/4" with 9 levels, Drill #4 covers 1/4" to 1-3/8" with 10 levels, and Drill #5 ranges from 3/16" to 7/8" with 12 levels. - Enhanced Drilling Efficiency : The unique 3-sided shaft design ensures a secure grip in your drill chuck, preventing slips and allowing for precise drilling. The dual-edge blade construction facilitates quicker and smoother cutting for optimal performance. - Robust and Durable Construction : Crafted from high-quality tungsten carbide, these step drills are built to last. The titanium coating minimizes friction, ensuring lower operational temperatures and enhancing drilling accuracy. - Automatic Deburring Feature : Enjoy clean, smooth holes with the automatic deburring function. These drills remove burrs as you drill, providing professional-grade results without the extra cleanup. Use Scenarios : 1. Perfect for electricians, these step drills can effortlessly create precise holes for conduit installations. 2. Ideal for DIY enthusiasts looking to upgrade their home, allowing for easy installation of fixtures and fittings. 3. Essential for construction professionals who need reliable tools for rapid and clean drilling in various materials. Elevate your drilling experience with this versatile step drill set that combines efficiency, durability, and precision to tackle any project with confidence.