I got mine and they are indeed square and they do fit the square Gotoh tuner shafts of yesteryear. I believe Paul Hostetter made a comment that a Waverly button fit the Gotoh square shaft. I don't know if we can assume that these would fit a Waverly square shaft . I think I'm going to keep these. I might have to find a mandolin to put them on
Gotoh's Compared on Paul's site
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