Features: 1. The circular cutting jig is very suitable for making speaker cutouts and is easy to install and use. 2. The tool can cut 256 circles with diameters ranging from 2‑1/4 to 18‑3/16in. 3. Precise‑drilled pivot holes fix the pins in selected holes, perfect for plunge router. 4. The easy‑to‑read scale has been calibrated for 1/4‑inch milling cutter heads. 5. It can be directly installed on the base of various types of plunge routers. Specification: Item Type: Circle Cutting Jig Material: Plastic Weight: Approx. 284g / 10oz Product Size: Approx. 33x17x0.5cm / 13.0x6.7x0.2in Package List: 1 x Circle Cutting Jig Features Easy Installation and User-Friendly: The Circle Cutting Jig is designed for effortless installation and simple operation, making it perfect for DIY enthusiasts and woodworking professionals alike. Versatile Cutting Options: With the ability to cut 256 circles ranging from 2‑1/4 to 18‑3/16 inches in diameter, this tool offers a wide range of cutting possibilities for various woodworking projects. Precise and Reliable: The Circle Cutting Jig Features precision-drilled pivot holes that securely fix the pins in selected holes, ensuring accurate and consistent results every time. Ideal for use with plunge routers. Convenient Measurement Scale: The easy-to-read scale on the jig is calibrated for 1/4-inch milling cutter heads, providing clear and precise measurements for precise cuts. Universal Compatibility: This woodworking accessory can be directly installed on the base of different types of plunge routers, making it a versatile and compatible choice for your woodworking needs.