Just curious: I just use one of those bigger set of pliers to crimp a connector like this. (Not needle-nose, more like a wrench, but still pliers with jaws. Don't even know what they are officially called!) But is there actually a specific tool for this? The wire goes into the fitting which is sort of a circle that's broken at the top, and then you're supposed to mash down each side of the top of the circle so that you get a V into the wire. Although with my pliers approach, I do one side and it flattens into the wire, then I do the other side, and it kind of just wraps *over* the other side. So the original circle shape is still there with the wire inside, just that the tops of the circle overlap instead of digging into the wire like the nice picture on the back of the connector packaging.