Propulse Classic Bindings are Salomon's top-tier, classic race bindings. These effectively replace Pilot Classic Bindings in Salomon's product line. For use with RS17 Pilot Sole equipped classic boots. Note: Propulse Classic Bindings do not engage rear pin on Pilot Classic soles. RC2 version features full width heel plates for mounting atop NIS Plate-equipped skis, but still uses screws to secure to ski. Sold in pairs.