Fits Gibson style 5 string banjos. Mine is a Wildwood Artist. This key fits perfectly and does the job.
This seems to be a nice wrench, but I assumed from the listing that there were only two common sizes so I ordered the 5/16", knowing 1/4" is too small. It turns out my Deering Goodtime falls between the two....9/32" which I'll have to find elsewhere I guess.
I have both, not much to say except you can not find a much better value for an essential banjo tool.
Wrench worked exactly as it should.
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