Routers are used to cut shapes and profiles into the edge of boards, cut patterns and duplicate shapes, trim edging and laminates, make signs, and cut internal holes like mortises and recesses. A plunge router allows you to adjust the depth of cut while the router is turned on. Features to look for in a router include: HP of motor,variable speed, bit size and base configuration. Router accessories include jigs to make table legs, dovetail joints, and mortises,edge guides, bushings for sign making and router tables.