Give me two moments, just got into my shop. I’ll take some calipers to mine.
Okay, small wrench comes out at .530 inches or 13.19 mm. About as close as you’re going to get to 1/2". The larger wrench is .880 inches or 22.36 mm. Can I insert here how much I loathe decimal imperial? At 70 years old I have no problem working with fractions ,been doing it for so long now that it’s a cinch. If I want to use a decimal system, metric is there for you and I use it almost as often. But trying to equate 1/10 the of 16 drives me up the wall. Rant off. Hope this got to you in a timely manner.
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