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Sandvik abrader top: 2007-08-14.
Nikon Coolpix 8400
This is a tool I bought some years ago, principally for model aircraft work. I'm not sure if it's still available.
Sandvik abrader working face: 2007-08-14.
Nikon Coolpix 8400
This is the working side of the abrader. Unlike the Perma-Grit and similar tools, the abrasive surface is not made up of small particles welded onto a substrate. Instead, the metal surface seems to have been punched from the back side with many small holes. I don't expect this to be as long-lasting as tungsten-carbide grit files, but it does have the advantage that the surface is very even. T-C grit files often have occasional larger particles which can cause scratches that take a lot of work to remove with the next finer grade of abrasive.
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