hi im so hoping someone here can help me..
i needed to tighten the handbrake on the partners Chrysler 2001 grand voyager LE
as i was about to remove the brake calipers so i can access the screw to tighten the handbrake which is hidden behind the rotors id say from my searches online and as i see no other tightener this is my only access to the hand brake adjuster......the problem is the caliper pins that hold the caliper on are are HEX nuts not the traditional BOLT head...

so i bought a hex socket set but none fit 5/16 too big and 1/4 too small....then i tried a allen key 7mm too small 8mm too big!..i live in Australia and obviously this is in American car and measurements and i cant buy this size hex socket off the shelf at my local auto shop...i did some research and im after a 19/64 or 7.5 mm hex/socket head i cant not find any info on the caliper bolt specs but i did a scale shot with a tape measure and its 7,5 mm......ANY help on this would be GREATLY appreciated..ty for your time......

 

after doing some more looking into this i went back and looked at the pic i had and magnified it and it is 7mm!!! the picture i took due to the location was pretty dodgy but blowing it up it is a 7mm hex head..Im very sorry for the confusion ive never had to deal with this before,im far from a mechanic but all is good now and handbrake is fixed......