Ok, next....

Trying to remove the flipper bats but the little hex bolts on the pawl (?) are really tight. I managed to undo the ones for the upper flipper but the two main flippers are stuck fast. My hex key is bending when I try to loosen them. I have applied a little WD-40 but no effect so far. Maybe my hex key isn't up to the task. Anyone else had this problem? Remedies?