Socket sizes are as varied and as diverse as the automotive landscape, as a whole. Yet, among all the many socket sizes that we commonly use on our vehicles, from 5 mm to 36 mm, why are 20 mm sockets so rare? I’m not the only person noticing this either, as countless other people have noticed it, too. Whereas sockets like 8 mm, 10 mm, 12 mm, and so on are fairly common for cars, 20 mm ones are practically …
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