Ok, I went to remove the brake caliper from the fork leg as step one of my fork gaiter project and ....what are those wierd looking bolts.Out of the 200 some odd sockets I have nothing works.Not 3/8,11/16,10mm, 11mm is close but just close enough to strip it so what special tool do I need to run out and buy now?

 

It's a 12 point - 10 mm socket.

 

Thanks I've got a couple or three of these wierd looking sprockets just not the 10mm.

 

the smaller ones on the caliper are 1/4 12pt, don't take those off unless you are doing a pad change... those are the pins that hold your pads in.

so...
10mm 12 pointto remove the caliper from the fort
1/4" 12 point to remove the pad retainer pins

they sure keep it simple don't they?