Last Christmas I bought a 1/4 inch 18 v Milwaukee std (not fuel) for small projects... and a 18v 1/2 inch fuel for the son to take to work on Big rigs..
During the summer, the boy has my tiny 1/4 inch in the garage tearing down a Jeep engine with the 1/4 to 1/2 adapter, turns out the tiny impact will remove lug nuts and flywheel bolts...

At work the 1/2 fuel out performs the other techs Snap On cordless and his 3/4 air impact...for removing tractor springs and lug nuts on the big rigs.