This is a cast brass wall light with arm. We’ve also added a 10 inch brass cover to dress it up a little. The light measures a total of about 12 inches long and will extend down about 7 inches. The triangular mount plate measures 3 inches on each side. There are three mount holes. Because this mount plate will not cover most standard junction boxes, we recommend adding our 6 inch brass plate for an additional $20 each. The light weighs just over 4 1/2 pounds.