Much stronger and better than any other hardware store. The big difference is how the J-Box attaches to the bar. Also, a metal tripod compression bar ends with metal rods that you use with a wrench to increase the pressure on the rafter boards. Super easy install and I know it won't work. He holds 85 pounds. fan, but before putting the fan in the box, I carefully and safely hung myself for 10 seconds to test the strength. The compression fan kits bought from another store were not strong, thick