Perfect guidance on the guide rail through fine adjustment of the guide play. Additional handle on the adapter to enable safe handling. Is mounted using the rods supplied with the router. The support prevents the router from tipping off the guide rail. With the guide rail adapter, the router can be guided safely and exactly straight on the guide rail. The combination with the guide rail is particularly suitable for routing grooves, burr strips, ornamental grooves or cut-outs in the surface.