This Saf-T-Box allows you to safely and securely install a ceiling fan or light fixture during new construction or in locations with attic access. This heavy-duty, 1-1/2 in, all-metal electrical box, with 15.5 cu-in wiring capacity is UL listed to support fans up to 70 lb and light fixtures up to 150 lb. Featuring dual mounting capability, it includes 10 to 24 threads for heavier fans and fixtures and 8 to 32 threads for cover plates and lightweight lighting fixtures. The Saf-T-Box also includes a saf-t-cap to protect bolts and wires during drywall installation and painting.