Wide Range of Sizes: This step drill bit offers three hole sizes for versatility: 20 mm, 35 mm, and 50 mm, suitable for a variety of applications. Sturdy Construction: Made from materials with hardened components to enhance durability and extend the tool life for longterm use. Precise and Accurate: Precise dimensions ensure clean, accurate holes with smooth edges, enabling professional results in woodworking and metalworking. Efficient Cutting: The straight flute design provides smooth, effortless cutting through wood, aluminum, and metal sheets, improving efficiency in your projects. Practical use scenarios: Drilling large clearance holes in thin metal sheets or electrical enclosures for wiring and fittings. Creating larger holes in wood or plywood for hardware, conduits, or routing passes in cabinetry and woodworking. Enlarging holes in aluminum panels or metal sheets for fasteners, connectors, or fabrication tasks.