I had just bought a new double-wide garage door, and looked at the rollers that came with it - looks like junk to me. I searched and found these, so as the installation happened, these rollers are in from the very start. Why wait a year or two and then replace the originals? Looking forward to a long smooth life from these!
Bought two to replace in existing garage doors for which no key was available.
They fit perfectly and were quick to replace.
Now we have a lock with keys.