There are three types of skate bindings: the SNS Pilot system, SNS Profil, and NNN/NIS, and each binding offers a different group of users a particular benefit. Historically, a skate binding was simple: it used a small, rubberized toe clamp to grab a bar under the toe of your boot and secure you to the ski. The SNS Profil binding still focuses on this design while the Pilot system (an evolution of the Profil) replaces the rubber bumper with two rigid axles that provide more control and improved responsiveness for aggressive skiers. NNN/NIS bindings are used by both beginners (mostly NNN/NIS) and experts (mostly NIS), offer cross compatibility between NNN/NIS and NIS, and can be used with an integrated NIS plate for screw-free mounting and adjustment.
Skate bindings come in three flavors. SNS Pilot boots work with Profil and Pilot bindings, Profil boots work only with Profil bindings, and NNN/NIS boots only with NNN/NIS bindings. Boot compatibility is indicated in the technical specifications on the binding product page.
SNS bindings mount to any ski that doesn't have an NIS plate, while NNN/NIS bindings can be mounted straight to the ski or to an NIS plate. Ski compatibility is indicated in the technical specifications on the binding product page.