The Porter-Cable 42160 is a standard router edge guide. The standard router edge guide uses the straight edge of the workpieces to guide the router for edge cuts, as well as inside cuts. Its easy to adjust, with simple thumbscrew clamps. It fits Porter-Cable routers, model number 100, 150, 350, 630, 670, 690, 693 and 691 (with Type 1 or 2 base). It comes included with the guide body, two rails and hardware.