Here's a video that shows how to create a square dead end molding for additional design to your household. 1. Take the two pieces of crown molding and move them to the power saw. 2. Set the saw to 45 degrees right and cut a 90 degree outside corner in one of the moldings by setting it flat against the fence with the bottom of the molding up. 4. On the other piece of molding flip it upside down as compared to the first molding and make the same cut. 5. Now, move the saw to 0 degrees. 6. Take the second molding that was cut and look at the line at the back side and make the cut in that line. 7. Glue this piece of the cut portion and to the first moldings or the longer piece and mount it in your wall to get a finished dead end look.