This lightweight racing binding is lighter, more durable, and a more secure fit than the Performance Skate. Even more importantly, the Super Skate can be adjusted WITHOUT an NIS key; you can adjust the binding forward and backward with just your finger. Fine-tune for more control (forward) or more glide (backward). These bindings also have a minor toe-incline to increase glide phase performance. Fits all NNN-compatible boots (including Prolink and Turnamic). These bindings only affix to skis with an NIS plate (Nordic Integrated System). Dual flexors for proper skate ski balance and control. Even wider platform than 2.0 binding for more stability and control. Sold as a pair.