Mounting bosses are an extra-cost option. They make a clean, theft-resistant installation. No fasteners or holes are visible after installation. The drawing below shows a detail of the mounting boss and bolt on the back of the plaque.  It is ready to be set into masonry mortar. You may also drill through the front of the plaque and screw or bolt it to the mounting substrate. Use flat-head screws and cover them with the rosettes we provide.