I've been making some knives and happen to run across the etching post in the archs. First I tried it w/ an old butcher knife and I didn't do it long enough, it looks ok, but could be deeper. Just a few mins. ago I tried it again w/ one of my new knives. Worked pretty dang good this time. I bought the clips and the 6v battery for $5, and I used 5 layers of masking tape, because that is what I had. The skys the limit now. The 1st pic is the knife w/ tape and pattern cut out. #2 is afterward w/ tape still on and #3 is the finished product.