SNS Propulse RC2 is a lightweight, World Cup level classic race binding that’s close to the ski for maximum kick efficiency, and a one rail system for more control. Compatible with only SNS Pilot boot (even though these bindings do not utilize 2nd toe bar of boots). Wide opening engine, and ergonomic lever. 256g per pair. Flexor/Snubber ’85’ for easy kick. Binding is affixed to ski with five screws per binding. Sold as pair.