I recalled this thread while using my snips and took a closer look. Those cutting jaws are just too tight to get a grinder into, you'd need to tear the whole thing apart. My new suggestion would be to follow the $3.99 throw-away, or the $14 Lifetime routes(or some happy medium in between), and just toss em. I can't even see the brand on my old clunkers, but I doubt it's the best set I've owned. It has however, lasted for many years, and darn near the scrap stage itself.

You can also find them at yards sales, pawn shops, and flea markets on the cheap, just watch for brand names or "made in USA" if you want a better pair out of the deal. You might also find it best to resist jumping up and down yelling "i found it! I found it!" before asking for the price on them too ; )