If you have a wood router with a 1/4-in. collet, buy a carbide straight-cutting bit with a 1 to 1-1/4-in. cutting length (sold at home centers and woodworking stores). Place your straightedge on ...

Though it requires a larger investment than some beginner routers, this is a high-quality, versatile tool that should last a lifetime. The model comes with both ½-inch and ¼-inch collets.