Last year I took down a chandelier and replaced it with a ceiling fan. I should have replaced the mounting bracket but it was hard to deal with it through the 4" opening so I just used the existing box. I could never get the fan to mount flush with the ceiling and it always wobbled when on high speed. "There must be some better way to make this work," I thought. Finally I discovered the Saf-T-Brace, ordered it with Amazon Prime, received it a couple of days later and was ready to redo my previous patch job. The hard part was getting the old mounting bracket out of the way. It used thin enough metal that I was able to nibble through it with side cutters and then bend it out of the way, after removing the junction box.. Somewhat difficult working through that little hole, but not terrible.Then came the easy part: I extended the Saf-T-Brace to about 22", stuck it through the hole, positioned it over the opening and twisted the bar to extend it until it was tightly jammed into the ceiling joists. It was really solid! Though I didn't try it, I'm sure I could have done a one handed chin-up from it without a problem, were I strong enough. Next I slipped the holding bracket over the bar then opened one of the cable feed-throughs in the supplied new box, inserted the plastic cable clamp and slipped my wires through. The handy little magnet piece made it easy to get the included box fastened on -- and I was good to go. Back up the ladder to rehang the fan and now it is tight against the ceiling without a trace of movement when running. The Saf-T-Brace is a well made sturdy product, that installed easily, worked as specified and I'm very pleased with it.