Tube wringer - GIF

Tube wringer. Rolling the crimped end of the tube manually or with a slotted key is much simpler.

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Previously:

https://www.homemadetools.net/forum/...028#post125436

I use a wringer reminiscent of this, but operates more like Altair's slotted key. This one is not compact, and requires some grip for the closing action. Maybe it's portability [as in loading/ unloading] applies in a good sized household, that someone could service various tubes?