Step Drill Bit Set, 4 Flute M35 Cobalt Pagoda Drill Bit Kit with 1/4 Inch Shank for Stainless Steel and Hard Metal, Includes 5 Step Bits Covering 1/8 to 1-3/8 Inch Hole

Item Type: Step Drill Bit SetMaterial: M35, CobaltShank Diameter: 1/4 InchHole Diameter:1. 1/4 to 1-3/8 inch2. 3/16 to 1/4 to 5/16 to 3/8 to 7/16 to 1/2 to 9/16 to 5/8 to 11/16 to 3/4 to 13/16 to 7/8 Inch3. 1/4 to 5/16 to 3/8 to 7/16 to 1/2 to 9/16 to 5/8 to 11/16 to 3/4 Inch4. 3/16 to 1/4 to 5/16 to 3/8 to 7/16 to 1/2 Inch5. 1/8 to 5/32 to 3/16 to 7/32 to 1/4 to 9/32 to 5/16 to 11/32 to 3/8 to 13/32 to 7/16 to 15/32 to 1/2 InchPackage List：5 x Step Drill Bit1 x Drill Bit

• Four-Flute Precision Cutting: This step drill bit set features a 4-flute spiral design that cuts and smoother in stainless steel and hard metal, eliminating the need to change bits mid-job. The sharp, balanced flutes produce clean, burr-free holes without wobbling or overheating during extended use.
• Universal 1/4 Inch Shank Compatibility: Each pagoda drill bit in this kit has a standard 1/4 inch hex shank that fits directly into most electric drills, impact drivers, and drill presses without adapters. This ensures quick changes and secure grip for consistent performance across professional and DIY projects.
• Versatile Multi-Material Performance: The M35 cobalt step drill bit set works effectively on stainless steel, aluminum, copper, plastic, wood, and sheet metals. Ideal for HVAC technicians, automotive repairers, metal fabricators, and home DIYers tackling tasks like electrical box cutouts or pipe fittings.
• High-Hardness M35 Cobalt Construction: Made from premium M35 cobalt alloy with 89HRC surface hardness, these step bits resist wear and retain sharpness far longer than standard HSS bits. They withstand high-temperature drilling and maintain cutting efficiency even under heavy-duty use.
• Complete Graduated Hole Size Kit: This step drill bit kit includes 5 precision step bits offering incremental hole diameters from 1/8 inch up to 1-3/8 inch, plus 1 standard drill bit. Perfect for creating multiple hole sizes in one go, saving time and reducing tool clutter in your workshop.