Oscar Schmidt Tuner (at)

What shape is the wrench - star or square?

Will it fit oscar schmidt 0521cqtbl; pegs are square but have a rounded top that is slightly larger than the grover 8020 and it would not slip over

WIll this wrench fit the slightly larger pins (in cross-section) found on early model (ca 2010) oscar schmit autoharps?

Will this fit the oscar schmidt os21cqtbl