If you frequently switch between spray nozzles when cleaning with your pressure washer, this accessory will save you a significant amount of time. Just turn the nozzle to select between 0 deg, 15 deg, 25 deg, 40 deg, rinse and soap settings. Compatible with Karcher gas and select electric (K1700-K2000) pressure washers, as well as most brands of pressure washers equipped with quick connect spray wands.