If you are a router novice, before you mount that straight router bit there are some important safety issues to keep in mind. Routers are subject to the same kickback problems faced by power saw users. Using a dull bit can increase the kickback potential. Always use a sharp bit, or delay your work until you can purchase a new one. When installing a new router bit, seat it in the router "collet" and tighten the nut, making sure you leave an eight of an inch clearance from the collet bottom. Be sure to unplug your router before changing bits!