Originally Posted by
Underground
I keep one on me, along with a spare master link. It is a part of my multi-tool.
+1 I've got one of these for my main commuter and have a couple of the Park chaintools for my other bikes. Snapped a chain 50 miles out on a century a few years ago.
Over 50 years cycling between the 2 of us and neither had a chaintool. Wont go to the end of my driveway w/o one now.