LogFAQs > #967558399

captpackrat posted...

There's nothing wrong with Allen wrenches. As long as you're using the right size. And there's the fact that there's metric & inch versions. And for some reason 9 mm Allen wrenches are almost impossible to find, yet Volvo uses it for their brake calipers.

https://gamefaqs.gamespot.com/a/user_image/8/1/6/AAQwHjAADmbI.png
Seriously, why does nobody sell a 9 mm wrench?

Because its not a standard size for nuts and bolts. And in being so thats the exact reason Volvo uses them; so youre forced to buy the tool from them or take it to the dealership.