A revolution in binding design, the Black Diamond O1 telemark binding has become the benchmark in reliable downhill power and control with the added bonus of resistance-free touring for uphill efficiency. Push-button activation toggles between ski/tour modes with the simple touch of your ski pole tip. In tour mode, a smooth ergonomic pivot point just behind the pin line offers efficient climbing; in ski mode, underfoot cable routing and a pair of compression-spring cartridges deliver unmatched power and a predictable, progressive flex for precision downhill performance. A one-piece stainless steel toe box and solid-wire yoke heelpiece add torsional support and lateral control. With three cartridge options for customizing stiffness, the O1 is the ultimate, no-compromise freeheel binding. Features: One-piece Toe Plate Progressive Active Flex Choice of 3 Spring Rates Full-coverage Skid Plate 27.5 mm Lift Specs: Standard: Over 305 mm Boot Sole Length Small: Under 305 mm Boot Sole Length Weight: 3 lb 11 oz, Std MidStiff Pair Backcountry magazine '09 Editor's Choice: "When asked what the 01 was best for, one strapping female tester boldly quipped, 'It does it all! A jack of all trades.' Said one of the California boys: 'Possibly the best free-pivot tele binding on the market.' Testers liked the under-foot cable routing, saying it delivered 'quick,' 'smooth,' 'linear' engagement. Testers felt the 01 was easiest binding to switch to tour mode, hands down. Put the tip of your pole in the rear dimple of the green toggle switch in front of the toe plate and smack it down. Presto! You now have a solid 60°+ of frictionless free-heel motion, with a pivot point behind pin line for a more efficient stride. The only knock on the 01? The climbing pegs are easier to lift than older BD designs, but still not as easy as spring-loaded offerings from other competitors."