These self-tapping fuse holders are another 3M innovation that will save you loads of time, and give your install a professional look. Simply insert the wire on each side and, fold the splicing arm over for instant self-stripping and self-tapping connection that is not only easily installed, but easily removed, and even re-spliced if necessary. The adapter then serves as a ATC & MAXI fuse holder, perfect for vehicle wiring, alarms, remote starters, car audio, and more.