Polarized fishing glasses.
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Previously:
https://www.homemadetools.net/forum/...481#post151160
https://www.homemadetools.net/forum/...885#post202526
https://www.homemadetools.net/forum/...549#post197253
https://www.homemadetools.net/forum/...082#post195283
https://www.homemadetools.net/forum/...124#post168713
