5pcs Step Drill Bits for Metal, Step Drill Bit Set 50 Sizes Tri-Flat Shank HSS Titanium-Coated with Center Punch for Aluminum, Wood, Plastic, with

5pcs Step Drill Bits for Metal, Step Drill Bit Set 50 Sizes Tri-Flat Shank HSS Titanium-Coated with Center Punch for Aluminum, Wood, Plastic, with

【LESS DRILL BITS WITH MORE SIZES】:This high-speed steel step drill bit set includes 5 step drill bits with 50 sizes.The step-by-step design of the step drill bits allows it to gradually expand in a hole, meeting various drilling needs for different diameters. The step drill bit does not need to be replaced when holes with different diameters are machined. 【HIGH WEAR RESISTANCE】: This set is made from high-speed steel and combined with titanium coating, providing the drill bits with excellent wear resistance and heat resistance.3x longer life with uncoated step drill bit. 【118° SPLIT POINT TIP & SIZES MARKING】: The 118° split point tip can minimize friction and resistance during the cutting process, thereby improving cutting efficiency. The laser-etched size markings provide positioning assistance for precise drilling, making the operation more user-friendly. 【WIDE APPLICATIONS】: This step drill set is not only suitable for metal processing, but also can be used for drilling holes in wood, plastic and composite materials. Whether you are a professional machinist, carpenter, or a home DIY enthusiast, you can benefit from it. 【SERVICE GUARANTEE】: If you encounter any issues during use, please feel free to contact us at any time. We will respond to you within 24 hours and provide a solution. This high-speed steel step drill bit set includes 50 sizes of step drill bits with a center punch. The step-by-step design of the step drill bits allows it to gradually expand in a hole, meeting various drilling needs for different diameters and depths. It effectively controls hole sizes, reduces material waste, and achieves precision drilling with high accuracy. This combination enables you to complete multiple drilling tasks with a single tool, enhancing work efficiency.