Hexagonal Grinding Wheel Step Spiral HSS Steel Reaming Set for Sheet Metal and DIY Home Storage Bag Included Drill, High-Speed Drill, Titanium-Coated

Set of 3: 4-32mm 15-row (77mm long), 4-20mm 9-row (50mm long), 4-12mm 9-row (46mm long) Step Drills x 3 + Storage Bag High-speed steel: The surface of ultra-hard high-speed steel (high-speed steel 4241) is coated with titanium, making it stronger and sharper. Wide range of uses: Drill holes in common household and work items, galvanized iron, aluminum, wood, vinyl, plastic, etc. Applicable scenarios: house openings, vehicle repairs. The step drill steps from small to large holes, allowing you to drill holes of various sizes, enlarge and repair holes. Compatible models: electric drills, rechargeable drills, impact drivers, etc. (Rechargeable drills must be 12V or higher) This titanium-coated helical HSS drill features a hexagonal shaft and a titanium-plated surface. This ultra-hard high-speed steel (HSS4241) drill features a stronger, sharper cutting edge. It's ideal for drilling holes in household doors and windows, various crafts, galvanized iron, aluminum, wood, vinyl, plastic, and more. The step drill allows for incremental expansion from small to large holes, allowing for drilling various sizes, as well as enlarging and correcting existing holes. It's perfect for car repairs, furniture repairs, and other DIY projects. Suitable for electric drills, cordless drills, impact drivers, etc. (Cordless drills must be 12V or higher.) Includes a set of three step drills: 4-32mm, 15-row (77mm long), 4-20mm, 9-row (50mm long), and 4-12mm, 9-row (46mm long). Includes a storage bag. A great Father's Day gift.