This cable hanging system is perfect for securely hanging our light fixtures - offering an attractive and clean appearance. In addition, they allow the user to easily adjust the fixture up and down. The "pem" bolts of the cable hangers screw into "pem" nuts in the top of the light fixtures. The kit comes complete with 2-8 ft. long stainless steal cables and all mounting hardware necessary to properly hang a light from a ceiling or other support structure.