Quality was good. I cranked the set screw down rather tight with no stripping issues. I even took one back off and cranked it on once again and it worked fine. The pins seemed durable and I had no issues with them. I would prefer two set screws on the body but all six sets that I used had no issues with a loose wire once the set screw was tightened. I would also prefer a copper body. The red and black sleeves that slide over the connectors stay on well but I'll be careful when I pull out the connector if it's in tight. I feel more confident with non conductive sleeves rather than metal. Tip: Attach the connectors to your speaker wire so that the pins are pointing slightly away from each other rather than toward each other to help avoid shorting.
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