If you ever have to fill up in California using the emission style hoses, you already know how difficult that can be with constant fiddling, or is it wrestling with a 8 ft hose. This key slips on to the nozzle holding back the rubber/plastic hose just enough to allow easy filling. Especially when trying to fill smaller 5 gallons tanks or motorcycles, generators, or UTV's, boats. You'll wonder how you ever did it before. Has a hole in it to be used as on key ring or as washer. Thats what we used on our Hi Lift Jack Base mount.
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