No Left/Right Heel Support!
I would avoid buying this pair as your heel has no left/right support even when adjusted properly. It is an adjustment nightmare. As soon as your heel falls out the entire crampon falls off. I would fine a good pair that has bars to keep your heel in place. The BLACK DIAMOND Contact with ABS Crampons would seem to be a much better choice (note the bars on the heel) They are also stainless steel which means you don't have to dry them off every time to prevent rust.