Will these work with my wheel spacers?

Yes — the extended length is specifically designed for spacer setups. The studs will have enough thread engagement without the nut bottoming out on the spacer or wheel hub.

How do the aluminum covers stay on?

They slip over the acorn seat and sit flush once the nut is torqued down. Check torque spec in your vehicle's service manual to ensure the covers seat properly without cracking.

Can I use these as a direct swap for stock lug nuts?

Only if your studs are M12 X 1.5 — verify your vehicle's spec first. The extended length may interfere with shallow wheels or OEM designs, so test-fit before committing all five lugs.