Wide Range of Sizes: This step drill bit offers three different sizes (20mm, 35mm, and 50mm), providing versatility for various hole opening needs Efficient Cutting: The straight flute design ensures effortless cutting through materials like wood, aluminum, and metal sheets, resulting in high efficiency for your projects Sturdy Construction: Crafted with premium materials and hardened edges, this step drill bit is built to last, offering enhanced durability and long-term usability Precise and Accurate: With its precise cutting edge, this milling cutter creates clean and accurate holes without any jagged edges, allowing you to achieve professional results in your woodworking and metalworking tasks Convenient Hole Opening: Whether for DIY projects or professional applications, this hole opener offers easy and convenient hole opening, saving you time and effort Product Name:Step Drill Bit Size:Approx. 20mm, 35mm, 50mm(Hole Opening Diameter) Application:For woodworking Colour:Silver Material:Metal + Diamond Package Contents: 2 * Chamfer Bits Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.