General description This Irwin Step Drill Bit is designed for precise drilling in thin materials such as sheet metal, plastic, wood, and other similar surfaces. It features a self-centering point that prevents slipping and eliminates the need for pre-drilling or center punching. The drill bit provides clean, accurate, and round holes with minimal effort. Technical specifications Number of hole sizes: 10 Hole diameters: 5, 7.5, 10, 12.5, 15.2, 18.6, 20.4, 22.5, 25.5, and 28.3 mm Material: Industrial-grade M7 high-speed steel Design: Single-flute for maximum control and chip removal Size markings: Laser-engraved for easy identification Compatibility and accessories Compatible with standard drill chucks Suitable for use with power drills and drill presses Installation Insert the drill bit into the drill chuck and tighten securely Ensure the drill is set to the appropriate speed for the material being drilled Usage Mark the drilling point on the material Start drilling at a low speed to