I have had this problem in the past. I have twisted off the wheel stubs mounting and dismounting car tires LOL's. I am not a big guy, but with a cheater bar anybody can be a brute. Torque wrenches are for getting the right torque and for guys like me, that means not over tightening. :doah:
I saw these square headed bolts at my Ace Hardware awhile back, but Brad will probably fix him up with new ones. :thumbsup: