Step Drill Bit Set, 4 Flute 1/4 Inch Shank M35 Cobalt Pagoda Drill Bit Kit for Stainless Steel Hard Metal, Multi - Size Step Bits with 1/8 to 1-3/8 Inch Hole Capacity

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 delivers , smoother, and cleaner cuts through tough materials like stainless steel and hardened metal without wobbling or tearing.
• Universal 1/4 Inch Shank Compatibility: Each pagoda drill bit in the kit has a standard 1/4 inch shank that fits most electric drills, impact drivers, and drill presses, ensuring quick installation and secure operation during heavy-duty tasks.
• Versatile for Multiple Materials and Users: Ideal for metalworkers, DIY enthusiasts, plumbers, and HVAC technicians, this step drill bit set efficiently drills clean holes in stainless steel, aluminum, copper, plastic, wood, and other sheet metals up to 3/16 inch thick.
• M35 Cobalt High-Hardness Construction: Made from premium M35 cobalt alloy with a surface hardness of 89HRC, these step bits resist heat, wear, and deformation, maintaining sharpness longer than standard HSS bits even under continuous high-speed drilling.
• Complete 6-Piece Kit with Wide Size Range: Includes five step drill bits covering hole diameters from 1/8 inch to 1-3/8 inch plus one standard drill bit, offering a full solution for deburring, enlarging, and creating precise holes in one pass without changing tools.