The easy-to-install CMA-450 is a 2' x 2' plate (secured by safety wire) that's designed to sit above the suspended ceiling unseen. Offers great flexibility for mounting: nine mounting hole positions with threaded ends for accepting 1 1/2" NPT extension column. Comes with 10 ft. safety cable, 20 ft strand wire, two outlet knockouts, four turnbuckles, wood eye bolts, concrete anchors and chrome finishing ring.