Step drill set with two-flute (double-cut) design — engineered for faster, smoother cutting and reliable hole-making in a single tool. Key benefits Faster, cleaner cuts: The two-flute cutting design reduces cutting resistance and produces smoother edges, so holes form quicker and require less finishing. Durable construction: Made from high-speed steel (HSS) and finished with a protective coating for improved wear resistance and longer life under regular use. Strong and stable: High strength and hardness provide consistent performance in repeated use, minimizing edge wear and maintaining cutting precision. Space- and cost-saving: One step drill set replaces 29 individual drill bits, eliminating frequent tool changes and simplifying bit selection and storage. Easy to handle: Balanced geometry and efficient chip evacuation make drilling more controlled and reduce chatter for a better user experience. Features and performance Material: High-speed steel (HSS) with coating treatment for enhanced durability and corrosion resistance. Cutting geometry: Two-flute (double-cut) design for reduced heat and smoother hole finishes. Function: Step drill design provides multiple hole diameters from a single bit, enabling fast increments without changing tools. Practical performance: Maintains hardness and edge retention under normal drilling conditions for thin materials and light- to medium-duty applications. Typical use scenarios Electrical and data installation: Quickly enlarge cable or conduit access holes in metal panels, junction boxes, and enclosures without swapping multiple bits. Sheet metal and HVAC work: Create clean, consistent holes in thin-gauge steel, aluminum, and ductwork with fewer setups and less deburring. General maintenance and DIY: Ideal for fast hole sizing in metal and plastic for plumbing fittings, mounting brackets, and cabinetry fixes. Who this is for Tradespeople and installers who need a versatile, reliable tool to reduce setup time. Hobbyists and DIY users who want a compact solution that replaces many single-size bits. What you get A step drill set (29-step configuration) made from HSS with coating treatment, offering durable cutting performance, high hardness, and easier handling for efficient hole-making.