Made of aluminum alloy, it is convenient to use and not easy to rust.Convenient center hole socket used to align the router so that it is centered in the bit hole .Make precise drilling and mounting of any router easy.It's easy to use and gets the job done right.Color red is brighter and shinier, the red cover protects the flip board from scratches for longer service time. It is easy to use, saves effort and extends the use of the cutting machine at the same time. Features: Made of aluminum alloy, it is convenient to use and not easy to rust. Convenient center hole socket used to align the router so that it is centered in the bit hole . Make it easy to precisely drill and mount any router. It's easy to use and gets the job done right. Color red is brighter and shinier, the red cover protects the flip board from scratches for longer service time. Features: Material: aluminum alloy plate Item size: approx. 120 * 120 * 8mm / 4.7 * 4.7 * 0.3inch Item Weight: 319g / 11.2 ounces Package size: 255 * 130 * 30mm / 10.0 * 5.1 * 1.2in Package weight: 367 g / 12.9 ounces Packing list: 1 * router table insert plate< /p> 1 * packs of fixing screws 4 * cover plates