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The wire savings claim actually checks out — I stopped wasting the tail end of every 4" spool the moment I swapped this on. It's a simple fix that's already paid for itself in my shop.

I've been using this spool adapter for a few weeks now, and the money I'm saving on wasted wire already feels like it's paying for itself. The 4-inch diameter design is surprisingly versatile and much easier to handle than my old setup.

Finally got this set up and even on my first quick test it already saved me from wasting about a foot of leftover wire. The 4-inch diameter design makes a huge difference for those awkward partial spools.