The JOES Tire Purging & Set Tool clips on the valve stem for attended or unattended use. A slide collar opens up quick flow ports for fast air dumping to purge tires in record time. Slide the collar up and the fast flow ports are sealed off guiding air through the adjustable bleed valve. The bleed valve allows your Tire Specialist to work more than one tire at a time with the assurance that the tire will automatically drain to the desired pressure. You can set the bleed valve to very low pressures preventing atmospheric air from re-entering the tire during the purge process freeing up your tire guy for other tasks without worrying that they will have to start the purge process over again. You can use the same JOES tire tool to rough in your race pressures. Simply adjust the bleed valve and clip it on your valve stem. Your tire will automatically drain to your desired pressure even when unattended. Use your tire gauge to precisely dial in your final setting. Use the slide collar for a quick dump of air or use the bleed valve to drain your tires to pre-set, right or left side, pressures while you work on something else! The JOES Tire Purging & Set tool has been track tested by top Cup teams. These top teams clip on several JOES Purging & Set tools allowing their tire specialist to purge and adjust multiple sets of tires simultaneously. The days of standing around waiting for air to drain are over. Just clip on the JOES Tire Purging & Set tool and go. Another simple, fast and easy tool from the JOES team!Pit Stop USA offers Joes Racing Products 32125, JOES Tire Purge Tool at low everyday prices. Be sure to check out all of our products from Joes Racing Products including Joes Racing Products Inflation Systems and more.