I'm not sure I understand your question. Do you have a plunge base router and want to mount a fixed base router to your table? When you bought your router did you get a plunge base only? Most of thodr being sold now come with both bases. If you dont have a Craftsman table insert you'll have to drill the mounting holes your self. Craftsman drilled router plate wont fit any other router I've seen. You can take the springs out of most routers making them easier to use in a table.