I recently bought a big bag of the 15 amp powerpole connectors, and although they went together fairly well, I found a good deal of inconsistency in how tightly the molded parts fit together in ganged configurations. It shouldn't affect anything electrically, but some pairs of connectors were very difficult to put together side by side, and others were so lose that they barely held the retaining pin. The mechanical fit from pin to pin seems fine, and I don't seem to be having any problems with weak connections. I'd give them a higher rating for convenience and utility, but for $1 per set, I expect a better mechanical fit. Maybe this was an off batch, and that's why they were on discount.