Rotefella NIS-NNN Performance Skate Binding. This lightweight racing performance binding is perfect for racing and sport. Fits all NNN-compatible boots (including Prolink and Turnamic). These bindings only affix to skis with an NIS plate (Nordic Integrated System)(not included). Bindings are able to be fine-tuned by adjusting the binding (w/ a simple key included) forward for more control, or backward for more glide. Easy to open and close binding with ergonomic lever. Dual flexor system for proper skate ski balance and tip control. 240g per pair. Sold as a pair.