I can't seem to find a socket for my 2004 ultra classic's brake pad pins. I was told that it takes a 1/4" 12 pt. socket, but the socket wall is too thick to fit over bolt. ( not enough space between bolt and caliper ) Is it a 12pt 1/4" bolt or does it take a special wrench? If it is 1/4" where can I find a thin wall socket? Thanks !