Silly question about an allen wrench

In Z1 and Z2 tool kits (as pictured) is a 10mm allen wrench...part number 92127-001. Where was this tool used? The only allen wrench required on my Z2 is a 5mm allen wrench used to tighten the allen bolts for the stator assembly. 

brake calipers

Yep...my error...just went and looked. Not sure how I forgot that.

Mcdroid wrote:

In Z1 and Z2 tool kits (as pictured) is a 10mm allen wrench...part number 92127-001. Where was this tool used? The only allen wrench required on my Z2 is a 5mm allen wrench used to tighten the allen bolts for the stator assembly. 

and an 8mm for the bottom fork bolts ???