In reply to Rollo: This is common and I believe most harscheisen (ski crampons) are made of aluminium alloy, they do bend but you can bend them back into shape and aluminium doesn't have quite the same metal fatigue issues that steel has, ther's a lot of ski mteering kit made of aluminium now for the lightweight issue. You can get aluminium ice axes and 12 point crampons now specifically for ski mteers. Useless on ice but fine for neve and snow.