Review on Enhance bifold door performance with Prime-Line N 6539 Slide Guide, Nylon (Pack of 2) by Jeremy Romero

This worked great. I had a track that was 1" wide and the original slider that the bi-fold door pin goes in broke. I went to other local stores and they sold almost everything else, whole door sets, track sets, multi-piece sets, etc. I did just needed this little slider and didn't want to cut the rail replace the old one and do a complete overhaul of a simple little missing piece I took the package, opened it up, turned it so the springs were towards me, pinched the plastic sides together and popped it straight into the track.Then all I had to do was pull down the pin on the top corner of the double door and insert the pin in the space between the two springs.Easy, took less than 20 seconds - and works great.This door/track is probably original to a house from the 50's or 60's so if it worked for that track and door I'm sure it will work for you too will ate. If it breaks for any reason, I keep a second one in my desk drawer ready to use as a backup.