Features TRANSPARENT ACRYLIC: Made of good quality 1/4in thick clear acrylic material, with high visibility, easy to observe the working surface and reduce wrong movements. ACCURATE CENTERING PIN: Equipped with brass centering pin for quick and accurate centering of the base, allows quick and accurate centering of the bottom plane chuck. WITH VARIOUS SCREWS: Comes with a variety of screws to accommodate various orifice plate sizes, flexible and versatile. FOR TRIMMED ROUTERS: Bottom plate is designed with multiple pre set holes to work seamlessly with most trimmed routers. FOR BOSCH, FOR RYOBI: Universal acrylic router base plate kit is suitable for Bosch and for Ryobi, very practical to use. Specification: Item Type: Universal Router Plate Material: Acrylic, brass Diameter: 6.5in Thickness: 1/4in Center Hole: Approx. 30mm / 1.18in Centering Pin Length: Approx. 63mm / 2.48in Package List:1 x Pressure Baseplate1 x Centering Pin12 x Screw Note:Take precautions when using. Package List 1 x Pressure Baseplate 1 x Centering Pin 12 x Screw