hornady die nut wrench
thingiverse
This is designed for manual tightening of a Hornady die nut. It's a modified version of a widely used design found at Thingiverse (thing:2533367), which I've relied on frequently. The model prints well straight out of the box, offering a snug fit on the nut. However, if you require a looser fit, printing it at 101% should achieve that result.
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