One of the 12 80 grit sheets was used so there are 11 unused sheets. There are also 10 unused 320 grit sheets. I am told these were to sand down fiberglass to touch up some nicks on our boat with the 80 grit doing the heavy removal work and the 320 grit doing the final fine tuning to get ready for paint. We sold the boat in 1971.
* Premium Aluminum Oxide grain with anti-loading/clogging features
* Exceptional results in dry sanding and finishing applications for wood, auto body, marine, paint, primer, metal, plastics, fiberglass, putty, filler, and composites.
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Use by hand or attach to high speed vibrating sander