Instruction: Answer the given question using the supporting document.

Input:
Question: Can anyone confirm the dimensions of the square hole? Product description says 5/16" (10.4mm) but 5/16 is not 10.4mm . Thanks!"Knife is 1 3/4" (17.3 mm) tip-to-tip. 3/16" thick. 5/16" (10.4 mm) center hole" = metric FAIL.
Document: These knives come in polished stainless steel and are much better than the OEM version. Make sure the square drive dimension is correct for your grinder shaft.
The blades are definitely an industrial strength, and not thin like others I saw while shopping around. They are sharper than they look in the pictures. Thanks Smokehouse Chef!
Amazing and far better than the original!! I think the original got tossed in the garbage on accident, so we had to order another. I put the blade in backwards the first time and it did not work well at all. :-(  Then, I realized my error and turned it around. After that...just wow! Clean cuts and perfectly ground product!! We grind our own ham, pork, bacon, and hamburger.
The blades aren't a perfect fit. They are a little larger that the original blades and they have since cut some of the plastic grinder housing. After using it for about 10-20 minutes the blade stopped cutting the housing. The blades aren't perfect and as far as I can tell some of the smaller holed grinding plates, the holes, are not being completely covered by the blades as one blade passes over it. I hope that is described well enough.
these blades fit and work like a charm
sent to wrong address, but kind neighbor brought the package over. meets all expectations. nice to have a spare blade.
Yes
Unlike the blade that comes with the Kitchen Aid FGA, this one only works if the sharp edge of the blade scrapes against the grinding die (the kitchen aid one works both ways). This works fine, but didn't really think it was sharper than the kitchen aid blade that I'd kept sharp on my own.
Totally awesome blade,  very sharp. Is even better than the original. Two pack allowed me to share with a friend.
This wasn't really an issue because the ground beef cooked up the same either way but this is better for burger making or sausage making.The price is right and they work just as described. I am a satisfied customer and would definitely buy again.
Answer: The center hole is 10.4 mm.  You are correct.  That is closer to 3/8".