i'm not one for gimmicks...but i'll tell you the "Speedy Sharp" is truly unbelievable. Whether it's your hunting gear, lawn mower blade or rusty old axe!
Oh yeah, they do work, and I use some something similar for my brush machete, but never on my fine knives. They do literally peel the steel, lol but it just slicks off D2 or S30V. Having said that, I have one in my go bag just in case.
