The SelecTwist™ Cleaning Tool Assortment helps you clean the tiny jet orifices of Sewer Jetter nozzles that have 4 or 5 spray jets. Each miniature tool has a tiny, tapered stainless steel tip with a spiral cut to help you remove dirt and sediment.Blue and Green tools are recommended for cleaning the nozzles of premium sewer jetters for electric, including The Original JetSnake for Electric, Wet Hornet, General JM-1000 Mini-Jet, Ridgid KJ-1350 and Ridgid KJ-1750.Black and White tools are recommended for cleaning the nozzles of premium sewer jetters for gas, including The Original JetSnake for Gas, General JM-2900, General JM-3000, Ridgid KJ-2200 and Ridgid KJ-3100.Yellow and Red tools are recommended for cleaning most budget sewer jetter nozzles up to 5 GPM with lower-force jets.IMPORTANT:Only for sewer jetter nozzles with 4 or 5 spray jets and total orifice sizes from #2.0 to #8.0.TO USE:Connect the pressure washer or pump to the water supply, do not start the machine, and allow water to run through the sewer jetter at low, household pressure.Gently clean the nozzle jets with the spiral tip of the tool until you see low pressure, constant streams of water from all jets.Do not ram the cleaning tool with force, and do not bend it.Only for cleaning sewer jetter nozzles, which have smaller diameter jet orifices than other nozzles. Not for other uses. Sharp tip. Handle with care.