HB1SW COVER, SWTCH HANDY BOX | The Carlon handy box is a non-metallic switch and outlet box specifically designed for use with non-metallic conduit systems and non-metallic sheathed cabling. Unlike metal boxes, the Carlon handy box has two integral cable clamps. These clamps hold non-metallic cable firmly in place without the need for separate clamps, simply push the wire into the clamp-opening and the cable is held securely in place. The Carlon handy box also comes with six 1/2 in knockouts on the sides and back for easier wiring and a variety of mounting options.