Although I did notice a slight increase in performance when I switched to these plugs, they are by far the worst plugs I have ever used. On every tool I've used them on: a double-action random orbit sander, straight and angle grinders, an air hammer, a cheap standard air gun, and two percussion guns. They wear out the raised portion immediately, within minutes of use, preventing them from rotating in the adapter and becoming an absolute monster to loosen. It wears down the lip and lifts it onto itself, requiring resurfacing to correct. Every time you use them. And that's in the Milton couplings. Not a cheap brand. I will not buy these again. Actually I will buy something else to replace all 10 I use. But hey. Your female couple is fantastic. I'm impressed.
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