Lubricate all of your air tools with Craftsman's 4 Oz. Air Tool Oil to prevent rust from forming and to extend the life of each tool. Don't wait to apply oil until you hear a click, see rust or your tool's performance worsens. Instead, start applying oil every few days or weeks to your air tools to maintain the equipment and ensure it continues to perform at the highest level. Simply place drops of Craftsman 4 Oz. Air Tool Oil in the moving parts in your air tools to prevent the formation of rust and extend the tool's life.