Box:
A 14 ml wrench is just a 9/16th by any other name.
...as a fourteen.milliliter wrench! :-)

And no, it isn't -- one of them is smaller, and won't fit on screws of the other's dimension; used the other way, the larger wrench will often slip and ruin the shape of the bolt-head. (No, I can't recall which is bigger and which smaller.)

Using a 13-mm wrench on half-inch (=12.7 mm) bolt-heads works better; there's less slippage there. (So I'd guess the difference between 9/16" and 14 mm is more than 0.3 mm.)


"I use volume measures all the time. (At least in Swedish, we even have archaic-sounding nicknames like "teaspoon" for a 5-milliliter measure.)"
proof that the metric system is so awful that you use the archaic terms to describe the new measurements.
No, just that we use old-fashioned shorthand to *refer* to our _superior_[*] measures.


Is it a quart or a litre? who the fsck cares while your swigging it down?
I do -- and according to Andrew, the liter is obviously superior! ;^)



[*]: Because they're _standardized_ -- how big is *your* "teaspoon"? Is that the same size as Andrew's? Or as the guy's who wrote the cookbook...?