We originally bought one of these when we discovered the Interlock chain's tendency to giggle nastily at Park tools and Topeaks and the like. But then regulars started asking for their own, and we realised that a bunch of people out there need something fairly substantial for wrangling 1/8 track chain. This is a semi-pro tool with some neat features like a replaceable rivet popper pin and a limiter collar that stops you pushing the rivet all the way out of the link. One spare rivet popper pin is included but you can add an extra one if you like. Take no crap from your Izumi!