I'm a sucker for tools. The latest unnecessary but way cool addition to my toolbox is called, simply, The Terminal Tool. It's designed for crimping electrical terminals onto really big wires, like this 6 AWG stuff:
There are ways that you can solder big terminals like this, and there are cheaper impact crimpers that you beat on with a hammer, but this one claims to actually shrink the terminal barrel down onto the wire. Here it is in action:
Sure enough, the diameter of the terminal barrel has been reduced until it's just a little bigger than the wire insulation. I did a pull test, and that terminal is going nowhere. Awesome.
Here it is with heat-shrink applied. I guess I didn't need to take a picture of this.
Even though I don't have things quite far enough along to run this big wire yet, I wanted to play with my new toy. And it was cool.