The high pressure water gun comes with removable components for functionality and convenience. It is detachable into three parts : nozzle, foam pot and water switch. You can choose a shorter or longer version of the nozzle depending on the area you want to clean. If you are cleaning narrow or deep areas, the longer nozzle is recommended. If it's just a flat surface where you don't need the extra length, the shorter nozzle will be easier to handle. You can easily change the nozzle at your convenience. The foam pot, for its part, allows you to create a thick foam which helps to remove dirt and mud, especially on vehicles. Finally, the water switch controls the incoming water flow, so you don't have to reach to the end of the hose to turn off the faucet. Open or close the water supply directly to the watering gun. Not only is this system practical, it also saves water and provides total control.