Grivel Air Tech crampon New-Classic yellow/grey Grivel Constructed of ChroMoly steel for outstanding strength In addition to 10 walking points, an extra pair of points grip on traverses and the double angle on the final front points bite down on the descent Tool-free adjustment of the center bar offers 2 length options to fit a variety of boot sizes (XL center bar needed to fit boots larger than 11) Included antibot plates keep snow from building up underfoot