I use a nut driver to take off and reinstall the outer panels on my home HVAC system, when changing filters or taking apart the units to clean, etc. Other than that, I will sometimes use nut drivers on bikes (bicycle and dirt bikes) vice T-handle with a socket drive end. Not much use for nut drivers these days. It's a niche tool and for the price Mac wants for a set of their nut drivers (I assume they are not made in the USA), they are not worth the price they are asking for. I bought my nut drivers from Napa (Carlyle brand).