On Wed, 12 Aug 2009 17:49:40 -0700, Smitty Two wrote:

I'm just a little worried because most of what I have to edge is asphalt
drive. Didn't think about it until after I started the thread, but would
the blade of a real edger eat the asphalt away?

Doubtful. What you hear is the *side* of the blade scraping the
pavement. It's not the cutting edge.