
As an experienced electronics technician. These things are great for my desktop power supplies for the various experiments I'm always doing. It's just that one end is always connected to a source that is connected to one of them, and I have a reliable power supply for the device under test by building the opposite pigtail. IMO excellent quality. I will get many connection cycles before needing a replacement. At this great price I might buy another order to check my supplies in the future. UPDATE: Bought again. These things are professional and of great value. Good for any energy project where you need a reliable connection. UPDATE Again: Bought again. Ideal for any demanding project that requires polarization of your wiring and power needs.

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