Otis Complete Cleaner removes carbon, copper and lead, taking care of all basic firearm-cleaning needs. This bio-based cleaner also acts as a rust preventative.-Removes stubborn carbon, copper and lead fouling with ease-Prevents rust and corrosion-Safe on all gun metals-Available in 2 oz. and 4 oz. bottleInstructions1. Apply Otis Complete Cleaner to bore with a patch. Let soak for 5 minutes.2. Run a bore brush to loosen up broken-down fouling.3. Use a dry patch to remove fouling and excess cleaner.4. Repeat steps 1-3 as necessary until clean.5. Once clean, be sure to lubricate and protect.Be sure to unload firearm. Refer to your firearm manual for proper maintenance of your firearm.