Park Tool Chain Tool CT-3.3

It’s compact, easy to use, and for most, really familiar. Park’s CT-3.3 is a great chain tool not only because it’s made of durable investment cast steel, but because replacement pins are available and (more importantly) it works with 1/8″ and 3/32″ chains. So no matter what chain you have, you’ll be certain you can adjust on the go with this versatile tool.