Northwave SLW X-dial SyStem KitNorthwave SLW X Dial System Kit from Northwave works as replacement kit for all 2017 onwards Northwave Shoes models with SLW2 locking system. Pressure is distributed along the entire surface, so as to eliminate hotspots and provide a glove like fit he only one that offers step by step and full opening release with just 1 single trigger Each click makes for a 0,72mm adjustment to provide infinite degrees of fine tuning