The Alpen HSS Step Drill 4-12mm is a high-quality drill bit designed for drilling holes in metal, plastic, and wood. Made from high-speed steel (HSS), it offers excellent durability, heat resistance, and sharpness for clean, precise drilling. The step design allows for drilling multiple hole sizes (4mm to 12mm) with a single tool, eliminating the need to switch between different drill bits. Ideal for creating stepped holes or enlarging existing holes, this step drill bit provides smooth, burr-free results, making it perfect for industrial, automotive, and DIY applications.