Self arrest with these puppies? Ever used your voile straps to secure an ice axe to a ski pole? It works if you have to but having the right tool for the job is always so much nicer. Combine with ski crampons or even boot crampons and you've got 4x4 low on your hands and feet. If you need more than whippets your in seriously steep snow or technical ice climbing terrain. I've found they just give me the confidence to get through a tough little section without worrying so much. Combine one with an ice axe as well and now you can have the security of an ice axe in one hand with the comfort and assistance of a treking pole in the other.