The Dynafit Radical Alpine Touring Ski Bindings are the latest version of the tried and true Radical line, bringing together a reasonable weight, the advantages of a ski brake, and rock solid durability. With a DIN range of 4 - 10 and a time tested design, some version of this binding has ruled the touring world for well over two decades. Why? They just work, and when you're deep in the backcountry that's often the most desirable quality of all.