Make your projects look and feel more professional. Wires that bend are wires that break, and no wire takes more abuse than the power supply. These sockets screw onto the side of your project box with a lock washer (included).
The three pins are positive, ground, and neutral. In the picture above, the positive is the 9 oclock pin, ground is the 12 oclock pin, and neutral is the 3 oclock pin.