Durable wear-resistant steel construction significantly extends the service life of this step drill bit, reduces maintenance costs, and maintains high performance across drilling projects. Wide range of applications with optimized portability, featuring a customized storage solution that keeps the step sizes organized and protected from damage. Improved heat protection: the stepped design enables intelligent heat management, minimizes overheating, preserves drill bit sharpness, and extends overall tool life. Optimized speed and precision: low cutting resistance and an innovative four-layer structure enable burr-free operation. The multi-layer cutting technology increases drilling efficiency. Use scenarios: - Drilling clean holes in metal sheets for electrical installations or metal fabrication projects. - Enlarge holes in metal panels or brackets with minimal effort and minimal burrs. - DIY metalworking tasks and general repairs requiring multiple hole sizes with consistent quality.