Brand: CMH
Model: CHN11/12
Chain speed: 11/12
Quickly check for damaged links on 11 and 12 speed chains.
Place the tool over the chain and run the chain through, any damaged link will catch.
Much faster and more accurate than a visual check.
You'll notice that it does catch on the quick link in the video, but not too much, and it's easy to confirm that it is in fact the quick link that catches.