This flip board is made of aluminum alloy, which has the characteristics of strong and wear-resistant, not easy to rust. Suitable for both electric trimming machine and engraving machine, practical and easy to use. If you need it, come and have a try, it will not let you down. Features: Made of aluminum alloy material, strong and wear-resistant, not easy to rust, has a long service time. Convenient center-hole bushing design which has 4 different sizes for you to matching the router. This tool can make accurately drilling and mounting any router easy, you can install it by yourself. There are two scales printed on the both side of panel, clear to read and not easy to wear. Suitable for both electric trimming machine and engraving machine, practical and easy to use. Specifications: Material: Aluminum Alloy Color: red, black (optional) Plate size: 235 * 120 * 8mm/ 9.3 * 4.7 * 0.3in Plate weight: 292g/ 10.3ounce Package size: 235 * 135 * 35mm / 9.3 * 5.3 * 1.4in Package weight: 500g / 1.1lb Packing list: 1 * Router Table Insert Plate 4 * Insert Rings 1 * Fixing Screws Set