Sawyer Extractor Pump Kit extracts venom and poisons from the bites and stings of snakes, bees, wasps, mosquitos and more. The Extractor"s double chamber vacuum pump action is designed to provide powerful suction for the extraction of venoms and poisons without the need for scalpel blades or knives used in other kits. Because it"s a pump, not a syringe, it"s easy to use with one hand. When using select one of the 4 plastic cups that will best cover the bitten area and attach it to the pump, then using your thumb simply push the plunger and the extractor pump will quickly and effectively remove venoms and poisons from beneath your skin. By simply cleaning the cups after each use you can safely reuse the pump many times over. The Sawyer Extractor is most effective at retrieving venom outside of the muscle areas of the body. Retrieving venom quickly can significantly improve treatment results by medical practitioners. In muscle areas such as the calf muscles, venom quicly enters the circulatory system and an extractor pump is less effective.