Here is a picture of the Regulator Richard is referring to.
http://www.flickr.com/photos/59741147@N02/5627840654/in/photostream/ [img]http://www.flickr.com/photos/59741147@N02/5627840654/in/photostream/[/img]
And a close up of the edge.
http://www.flickr.com/photos/59741147@N02/5627840286/in/photostream/ [img]http://www.flickr.com/photos/59741147@N02/5627840286/in/photostream/[/img]
It is a polished edge, but with excellent bite. A light touch anywhere along the edge cuts the skin deeply. Hence I said I am scared to unsheath it now. Easily push cuts newsprint as well. But the best part is the edge remains sharp even after heavy use on cardboard and particle board.
