Check the film archives! It was actually a 2x3 so he could wield it better...
My wife would always get pissed because i always said that Hacksaw looked like her ex!
His big finishing move was getting in the 3-point stance then charging his opponent and then clotheslining him. The charge was always timed of course at the exact moment that the disoriented opponent, who had been facing the other way, turned and faced him.