Ok, it isn’t a single tool. It is the best though! If you know someone who has been wanting to get into electronics, you’ve absolutely got to get them the entire kit. This thing comes with everything you need to get started. There are tools for disassembling your items, like screwdrivers, pliers, and a desoldering wick. There is a set of “helping hands” for holding your project while you fix it or assemble it. A soldering iron, some wire, and some solder for putting components in place, and last, but not least, a multimeter for testing everything out.
This thing is like a workshop in a box and it is available in the Maker Shed right now!