Wide Range of Sizes:This step drill bit comes with three sizes to open hole, 20mm, 35mm, and 50mm, providing versatility for various applications. Efficient Cutting:The straight flute design allows for smooth and effortless cutting through materials such as wood, aluminum, and metal sheets, high efficiency in your woodworking projects. Sturdy Construction:Made of premium materials, this step drill bit is built to last. The hardened items enhances durability and prolongs the lifespan of the tool, making it suitable for long-term use. Precise and Accurate:With its precise , this milling cutter ensures clean and accurate holes without any jagged edges. It enables you to achieve professional results in your woodworking and metalworking tasks. Convenient Hole Opening:Whether you are working on woodworking projects or need to create holes in aluminum or metal sheets, this hole opener is a reliable choice. It offers easy and convenient hole opening, saving you effort. Product Name: Step Drill Bit Size: . 20mm, 35mm, 50mm(Hole Opening Diameter) Application: For woodworking Color: Gold Material: Diamond Package Contents: 1 x diamond core drill bit 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.