6pcs 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 Aluminum Case, from Pro-Edge Technology

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About This 【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. Overview Material : High Speed Steel (HSS) Finish Type : Titanium Shank Type : 3-Flat Cutting Angle String : 118 Degrees Brand : Pro Edge Technology Show more