I ran across these when they came with my little Noctua fans. Please note they are for low voltage, but standard crimps should be fine. You just cut your wires, don't strip the end and slip the wires in and press done on the button with either the special tool or a pair of pliers. There is gel inside as well to make a waterproof connection. I just ordered some more and the special tool for them. It makes crimping so easy.