I STILL own a set of the prototype Crampons, minus a few pins, they are still just as good as the day i got them. I am not sure when the protos came out, but these take a beating, since then, its been the ONLY pedal i use for any kind of offroad bike riding. (still use balds on the street bike) You dont have to buy them, but its your loss, they are seriously good products. You can save money elsewhere, but why would you?