Solid tool for the at home mechanic.
bought this because I didn't want to have a broken chain on one of the long rides. Chains stretch and start derailing or break, A must have tool for keeping less Maintenace on gears or sprockets.
It does not get any easier. Especially for a mountain bike one should clean and lube the chain regularly. With this tool handy one can check for wear at the same time in seconds. This is so much easier than “breaking” the chain to measure overall length.