Hello, I have a 1928 banjo that ha square 1/8" pegs, used to tension the drum-like banjo head. As far as I can tell, no one sells a wrench with a square socket anymore (well, except the socket themselves, which have a square side). Does anyone know if these wrenches were popular in the 20s-30's, and if they can still be obtained. Feel free to contact me by email.