This Westinghouse Saf-T-Brace allows you to safely install your ceiling fan or lighting fixture in three easy steps--without having to access attic space. Ideal for installation during new construction or remodeling, this mounting brace can be put into finished ceilings through a 4-in. hole. This brace works with ceiling fans up to 70 lbs. The brace's three teeth easily twist and lock into the ceiling joists, its threaded multiple lead adjusts quickly, and its square tube allows for easy turning. For added ease, the 21-1/2 cu. in., 2-1/8 in deep electrical box can be positioned anywhere on the brace to fit your project needs. The brace works with existing ceiling joists between 16 and 24 in. wide. The Saf-T-Brace comes with everything you need for installation, including easy-to-follow instructions. It also includes a Saf-T-Cap to protect bolts and wires during drywall installation and painting. The brace is UL/CUL listed to support light fixtures up to 150 lbs. on 16 in. centers and 50 lbs. on 24 in. centers. It supports fans up to 70 lbs. Product reference number 01400. Material: Steel.