The Atomic Prolink Pro SK is a low-profile 2-rail binding with exceptional snow feel and a direct connection between boot and ski. The ultra-light Atomic Prolink Pro SK binding is a low-profile 2-rail skate binding that provides exceptional snow feel and a really direct connection between boot and ski. It has a Race Lever that opens and closes automatically. And as one of our Prolink bindings it’s compatible with NNN® and Turnamic®. If you’re a committed skier, it’s perfect. Prolink- Our binding systems are compatible with all 2 rails systems like Prolink, NNN, and Turnamic Boots. Low Boot-Binding Interface- A low, light and direct connection between boot and binding for great power transmission. Race Lever- A minimalistic lever that's opened and closed manually. Compact Engine Full Contact Engine Composite Guideridge 1-Axis 124 g