The second tool I had access to is the old "Matco SR-19". This baby has an eccentric knurled wheel on the opposite end of a 1/2" Drive.
It operates basically on the same principle, the drive torque forces the knurled wheel into the stud, locking it into the grip of the tool. Additional twisting force rotates the stud out of the threaded hole (be it the block, bellhousing, etc.).
PS> Of course - it was Wade (MarkIV/4280).
"The Right Tool for the Job"