Grivel's Regulation long bar (190 mm) makes changing from one size to a smaller one easy, by simply turning the bar over. The retaining tooth, on touching the crampon, automatically reduces the size offering extremely quick fitting with no tools. Remember that the right crampon becomes the left and vice versa
Essential kit for those with big boots. Enabled me to fit and use my 49 size Scarpa's with some Grivel G12s. Very easy to install, only takes a few moments and your good to go.