I prefer the serrations on the spine, like on this knife I have:
http://www.kershawknives.com/productdetails.php?id=156&brand=kershawI use the serrations anywhere it'll work in order to spare the main blade. As one example, those serrations work better than any scraper I have for a ferro rod. That serrated edge generates a shower of sparks with easy.
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If you're reading this, it's too late.