Its just a blunt "chisel" that I made from roadsign aluminum.
Rub it over the teeth a little, and they cut their own rake teeth, 
cleaning a file perfectly to the bottoms of the gullets
    yours Scott

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    Scott Grandstaff
    Box 409 Happy Camp, Ca  96039
    scottg@s...
    http://www.snowcrest.net/kitty/sgrandstaff/
    http://www.snowcrest.net/kitty/hpages/index.html