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 rivetpopper (one spare incl.) and a limiter collar that stops you pushing the rivet all the way out of the link. Take no crap from your Izumi!