Features: brand new and high quality Made of high-quality aluminum alloy plate & plastic ring, strong and wear-resistant, not easy to rust. Convenient center-hole bushing used to match the router, so it is centered in the bit hole. With clear scale and not easy to wear, it is a nice helper for woodworking. The easy-to-adjust full-width threaded hex for key to help you level and adjust the insert easily. It is convenient to use and easy to operate, saves labor. At the same for time, it expands the use range of the trimmer. Specifications: Material: Aluminum Alloy Plate + Plastic Ring Size: approx 300x235x95mm/11.81x9.25x3.74 inches Thickness: approx10mm/0.39 inches Inner Hoel Diameter: approx 75mm/2.95 inches Note: 1.Please allow 1-3cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Router Table Insert Plate 2x Rings 1x Auxiliary Tool