7mm
7mm Allen wrench
I believe that will be a 7mm Allen key.
3/8"
3/8" Allen wrench.
3/8" Allen wrench
On some later model Fords the calipers have 7mm Allen heads, -an unusual size.
You need 3/8 Allen key.
It's 12 mm bolts, not Allen key.
9mm
If your asking about what size wrench is needed to remove the bolt that holds the front brake calipers on a 93 Chevy pick up, it would be a 3/8" allen wrench.
take tire off! remove the slide pins on caliper,should be Allen wrench heads on bolts. then slide off of rotor!!
A 3/8 Allen key.