Quick installation without cutting any ceiling tiles the CMA-455 is designed to replace one 2' x 2' ceiling tile or sit above the suspended ceiling and is secured to the structure above with four tie wires. Threaded hole accepts 1 1/2" NPT extension column. Comes with 10 ft. safety cable, 20 ft. strand wire, two outlet knockouts, four turnbuckles, wood eye bolts and concrete anchors.