I don't know if any of you have installed one of these, but until last week, when I won it at a raffle for my community bike shop (Closed down by City inspectors), I had no idea that this type of bomb proof chain existed. It's a Wippermann, breaking point is 15 Newtons or 3 300 lbs, nickel plated and it won't fit in my Park's chain tool. It's also too short, so I'll have to buy another one($70) and figure out how to attach it. Pretty cool chain though. :mrgreen: