1.5mm stud
screw it into the arm till there`s about 1-2mm left showing out of arm
get the 3mm shock ball screw it on
that`s how it does go on the pinching effect of the 3mm ball in shock end keeps it on the stud by tighting it up
it`s the same way as it is fixed to the shock tower put screw through ,3 mm ball other side goes up tight & holds the lot together
does the ball stay on stud ,but shock end falls off ??
HTH
PS;;bear with us while we try to help you out
