There are occasions when I need to rout multiple mortises in a large workpiece. A recent project was a bed headboard. Instead of laying out the mortises and trying to eyeball where to stop routing, I decided to make a few stops that I could use with my router. You can see the stops in the photo above. Simple, but works. The construction of the stop blocks is easy. The stops are an easy build from plywood. A fixed front fence is attached to a top plate. The movable fence is attached to the top plate with a screw through a slot. This way, the stop block works with a wide range of workpiece thicknesses. The inside of the stops are lined with adhesive-backed sandpaper for extra grip. To use the stops, I position them by aligning my router bit with my mortises. Then, I can use a couple of F-clamps to hold the stops in place.