Kingpin 13The legendary Kingpin combines the lightweight ISI pin toe piece with an alpine heel piece including 0 7 13 climbing aid. This makes it very easy to walk on any terrain and ensures great descents with outstanding performance and top level release functionality. The binding is therefore perfect for ambitious backcountry and freeride touring enthusiasts. A very stiff, carbon reinforced front with an ISI toe piece makes the binding easier to step into,