The box comes with a selection of ½” or ¾” lock nuts and ears to be used with threaded assemblies, weatherproof hubs, or liquid tight fittings. Using a hole saw, drill holes into the box on the pre-marked lines and build your own combination on the jobsite. Instructions are molded to the back of the box. CMI’s box is economical to stock and gives you the freedom to use the exact size and geometry you need for any job. Meets NEC requirements & is UL Listed.