Will these work with my factory wheel studs?

Yes, M12 x 1.5 is the standard thread pitch for most vehicles. They thread directly onto factory studs — no modification needed. Confirm your stud pitch before ordering if your vehicle is non-standard.

Do I need special tools to install these?

Standard lug wrench or 19mm socket handles these nuts — same as your OEM hardware. Tighten to your vehicle's specified torque value per the owner's manual.

Are 20 nuts enough for my whole car?

Twenty pieces covers five wheels at four nuts per wheel. If you're running more than five wheels or need spares, order additional sets.