As with everything we do here at Mil-Spec, we have taken the standard 300A battery isolator and improved the design overall to make your install experience easier than ever!

If you've ever used this 300A battery isolator with standard tightening ring, you will know how hard it is the fully tighten your isolator into its housing/panel, and how much you destroy your fingers trying to do so on the thin, sharp sheet metal nut.

Our 300A isolator kit comes with a custom designed, Markforged ONYX printed nut, designed to save your fingers, and allowing you to get a shifter/multi-grips onto the nut, to fully tighten your isolator properly.

Ergonomically designed and made from the best PA-CF filament on earth!

Optional mounting bracket available!