This tool is designed for our one shot wonder pouches. The two valves, allows the water and product distribution to be a perfect ratio, no mixing needed. There is a small filter, that prevents any blockages. Simply turn on both valves, and let the tool do all the hard work. Needs to be purchased in order to use the One Shot Wonder, this tool is reusable. This to be used with our One shot wonder pouch, this makes for easy spray application. This simply clicks onto a garden hose connector and waters the product onto a lawn. Watch our demonstration video for instructions on how to use.