Hexagon
a hexagon
hexagon
If it stays on your face, it fits.
the general shape of mainland France fits roughly in an hexagon.
Hexagon
a hexagon
hexagon
Hexagon
6-sided is hexagon
To fasten and unfasten Allen screws and bolts. These fasteners have a hexagonal slot in the top into which the Allen wrench or key fits.
I believe that's a 5/16 Allen.
whatever one fits, some are torx..
I believe that would be a 3/8 Allen wrench. -Very common on Dodge /Plym brakes.
this is my question, lol. my answer is 7 mm Allen wrench. fits like a glove!
Buy a MM Allen set and then you can't go wrong.
The one that fits tightly in the Allen socket. -Any real artisan or mechanic has a set of SAE and a set of Metric Allen keys.