These rail fasteners were better than the originals that were installed on my garage doors when our house was built. Preferred Doors shipped the replacements promptly and without any issues.
After having a LiftMaster door opener installed in my new garage/shop, I soon realized that the HomeLink system in our '02 TrailBlazer would not synchronize with the new opener. I researched the pairing issue relating to my new door opener and discovered that I needed to install a bridge (repeater) to update to the current wireless control signal encoding. I ordered it, installed it, paired it, and it works as advertised. Fast ship, great price, and easy install -- pretty much Plug & Play!