This 10mm aluminium insert plate for router tables measures 229 x 305mm and is designed to fit the cast iron, phenolic or MDF router table tops. In each corner of insert plate thers a clamping screw that allows for adjustment of plates height in relation to the tabletop. It is supplied with a removable central insert ring with a 38mm diameter hole with a range of other hole sizes available. This includes one that will accept a standard threaded guide bush for template routing. The insert plate will accommodate most portable routers and should be drilled to individual requirements.