Heavy duty paper hole punch.
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Previously:
https://www.homemadetools.net/forum/...833#post152447
https://www.homemadetools.net/forum/...618#post139635
https://www.homemadetools.net/forum/...404#post150836
https://www.homemadetools.net/forum/...171#post157689
https://www.homemadetools.net/forum/...697#post151932