Wide Range of Sizes: This step drill bit offers three different sizes (20mm, 35mm, and 50mm), providing versatility for 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 , 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:. 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.