Fingernails, maybe? Once a set of points gets scratched up by a file, they don't last very long at all, particularly since both contacts end up flat, instead of one of them having a little radius. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
