I looked it up online. From the pages I’ve read it seems they’re called “Grounding Straps.” The point of them is to ground the car so static electricity can’t build up. They supposedly help prevent car sickness as well. Additionally they were popular so toll takers weren’t shocked then they reached out to cars to collect tolls. They were widely available in the 60′s & 70′s and are making a comeback.
Do any of you know more about these?
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