***Post a MEME Thread***

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The adjustment is for aluminum vs steel cans. The more expensive ones have just a lever to flip to change the tension. Growing up the screw type one pictured is all we ever had. I had a relatively "well to do" aunt who had the flip type, so I've seen them but never had an opportunity to use it.
I'm so old used to be a mechanic on a three piece beer can line, sealed the seams w/solder. Needed one of these to open.

 
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