like any vehicle when you have a lot of cars to work on and sometimes tools are lying around, things get lost or break. I had an accident where my tester got stuck when another technician reversed the car causing unnecessary expense but it happens. I bought this and it works great. I couldn't wait for the Snap On guy to come over so I bought this witch which was a lot cheaper and does the same job. The only thing I had to do was to caulk the rubber portion of the lower fluid chamber with an RTV. It doesn't leak but I like it if it has a bit of a shelf life plus I would recommend this product if you must buy it.
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