Rottefella NIS Touring Auto Classic Binding (aka Auto Tour). An easy, step-in automatic binding that fits all NNN-compatible boots (including Prolink and Turnamic). Durable and easy to use. These bindings only affix to skis with an NIS plate (Nordic Integrated System). These bindings are adjustable (w/ a simple key included) forward and backward along the NIS plate, giving the skier the ability to fine tune the skis for more grip (binding forward) or more glide (backward). Sold as a pair.