Review on Westinghouse Lighting 0110000 Saf-T-Brace for Ceiling Fans with Twist and Lock Mechanism - 3 Teeth, Silver (Pack of 1) by Seth Heck

I installed five of these ceiling fan mounts. I just want to add a few thoughts/tips for your setup. Use/buy an oscillating instrument. This makes it much easier to remove the old metal or plastic box. (You will use it for other things, trust me). With the oscillating tool you can cut out the old box and cut off the nails that were used to hold the old box in place. The instructions now state that you cannot use a wrench to tighten the bracket. After finger tightening the mount, I can't tighten it enough to trust it to hold a heavy ceiling fan through the 4" hole. I always use a wrench to turn the shackle one more time. Then I check it for movement and tighten it a bit if necessary. I want the teeth at the end of the bracket to sink into the wooden beam. Just my opinion.