Description Clean up your cases with the Hornady One Shot Tumbler Media. This media is made of ground corn cob for use in a case tumbler. The abrasive media removes tarnish and other residue from cartridge cases. Use with One Shot Metal Polish for a shiny, like-new finish. Firearms, trailers, and some accessories are only available for purchase in stores. Each location follows all BATF and individual state/county/city laws to insure the desired product is legal for sale. Any info provided online is subject to change, please go to your local store for more accurate information.