Works for disconnecting fittings but I don't know if all brands of this tool work the same way. This one seems really sloppy in the mix. The tool must be clamped over the pipe and then inserted into the fitting to loosen the clamps. Because the hinge of this tool is very loose, you really need to hold it firmly with your hand to keep it from slipping off. Works great on a bench, but when you're under a car and can only use one hand it's not that easy when it pops open and falls off so easily. I think it would be an excellent tool if the fulcrum was much narrower.
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