Tech bindings have come a long way in the last 30 years, but almost every binding on the market today still riffs on basic concepts pioneered by Dynafit. Sometimes it&';s best to go straight to the source, and the Dynafit ST Radical Alpine Touring Ski Bindings prove it. These hall of famers distill decades of R&D into a light, capable binding ready to carry you through any backcountry challenge. If you&';re looking for reliability, safety, and performance, look no further than the ST Radicals. Product Details Toe Step in Side Towers Stainless Ice Breaker Pins Tour Mode Speed Step Climbing Bar - Can be raised or lowered in seconds with ski pole. Boot Compatibility Requires Boots with Toe and Heel Tech Fittings Additional Features Adjustable Length - +/- 12.5 mm Ski Compatibility We recommend a brake width equal to or at most 15 mm wider than the ski waist width. Specs Type: Tech Length: Any Ability Level: Advanced-Expert More DIN / Release Value Low: 4 DIN / Release Value High: 10 Boot Sole Type: Tech Only Warranty: 2 Years Weight: 1.1 lbs