165-degree concealed hinge.
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Previously:
https://www.homemadetools.net/forum/...3522#post99314
https://www.homemadetools.net/forum/...222#post130638
https://www.homemadetools.net/forum/...3385#post98934
https://www.homemadetools.net/forum/...150#post138297
https://www.homemadetools.net/forum/...695#post118546