Excellent quality rolls. Will order again when the time comes. I recommend to everyone. Do not use plastic rollers. You shouldn't tinker. Don't forget to lubricate from time to time
I live in a small town and things take forever to fix. I measured my existing rolls and ordered the correct size. Easy installation, took five minutes as the top roller was missing.
These rollers have greatly improved the operation of my garage doors. A nylon version is also available (presumably quieter but may wear out faster). Do not under any circumstances remove the brackets on the underside of the door. With the right tool, these rollers can be easily removed and installed without disassembly. Find videos on YouTube if you don't already know how to replace them. I am completely satisfied with this exceptionally well-made product.