Originally Posted by
dedhed
Looks like a cheap spoke wrench and a disc brake pad spacer for when you removal the wheel. Keeps pads apart if you push the handle with the wheel removed.
I'd guess the holes are for a kickstand.
Wrong and wrong. As the OP now knows that is for the FS headset adjustment. The yellow block is obviously too thick to fit between pads...it's a bleed block. It only fits w/ the pads removed and pistons pushed back all the way.