Will these work on my wheels with spacers?

The 90MM length is designed for deeper offsets and spacer setups. Verify your specific wheel and spacer combo before ordering — if you're running minimal offset or no spacers, the extra length may cause rubbing on the inside of the wheel.

Do I need any tools to install these?

You'll need a wrench or impact socket that fits M12x1.25 — the open-end design just means you don't thread the nut onto a socket. Hand tools work fine; an impact gun speeds things up.

Can I use these on any vehicle with M12x1.25 bolts?

M12x1.25 is the thread spec, so they'll physically fit any hub with that spec. Confirm your vehicle's thread pitch and stud pattern before committing — mixing specs causes safety issues.