Having found great success with a Gem Featherweight, I've been researching single edge blades. It doesn't take long... I've gotten my hands on 3 carbon steel blades: Treets, Gem Blue Star and CVS blades. All three have 009 RD stamped on the spine. Are these 3 packagings of the same blade? Are PALs any different? I haven't tried the CVS blades yet but if they're the same as Treets, I'd be delighted ($3.50/10). Love the Treets.