The do-it-all chain tool in a convenient case. It rivets drive chains & cam chains. You can also 'break' a chain with it, but I recommend just cutting the chain instead...unless you're planning to reuse the chain. I still feel this is a bit pricey, but I also consider it a 'must have' tool.
Great little tool, and a must have for the do it yourself mechanic. Easy to use and small enough to throw in the tool kit for a weekend of riding. The versatility of this one tool is helpful as it will handle a variety of different size chains (just remember to grind off the pin before you break larger chains).
Bought this because the original pin broke. That was my fault (operator error). This new pin broke the first time I used it on a 525 chain. Never had problems with these before, but always on smaller chain. From now on I will always grind off the head of the chain pin before using this tool to beak a link. This tool seems to reach it's limit at a 520 size chain, buy a bigger one or grind the links like I will.