1. High performance Made of high-speed steel, this step drill is designed for wear resistance and toughness, delivering durable performance with minimal wear even after prolonged use. 2. Multiple sizes Four-step design provides an easy solution for drilling different sizes from 4/8, 6/8 and 1/8, allowing it to adapt to changing needs. 3. Reduce consumption The three-edged geometry reduces the number of turns, distributes edge pressure, and improves drilling efficiency. 4. Quick tightening Hex shank ensures high concentricity accuracy and enables quick tightening for streamlined and precise drilling to achieve premium precision. Applications - Metal fabrication and maintenance tasks that require holes in sheets or parts with varying sizes. - Installing or repairing electrical enclosures, control panels, and other equipment housings where different hole sizes are needed quickly. - DIY and professional projects that require accurate stepped holes and fast bit changes.