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SailBoatStuff Marine Hooks - Snap, Gooseneck Hooks, etc.

Maybe they are used for securing items inside the cabin whilst on the roiling sea. That way your coffee (shaving) mug won't slide off the...

I have seen strop hooks for sale before, on some hardware website or another. A simple metal hook that gets screwed into the wall. But I have never seen them for sale on a shaving-related website.