Hornady One Shot Case Polish 9993 is an effective way to restore your cases to a brilliant condition. This Hornady cleaning tool is designed for use with Hornady’s Tumbling Media. This gun cleaning solution is a water-based, bio-degradable polish that cleans, polishes and protects all metals except aluminum. Hornady makes it easy to keep your casings looking good and working great with the Hornady OneShot Biodegradable Case Polish.