Will these fit my wheel studs?

These are M12 x 1.5 lug nuts. Verify your vehicle's factory lug size before ordering — if your studs are M12 x 1.5, you're good. If you run a different thread pitch, these won't work.

Do I need to tighten these to a specific torque?

Refer to your vehicle's service manual for the correct torque specification — it varies by make and model. Proper torque is critical for safety, so don't guess.

Can I mix these with my existing lug nuts?

You can, but it's not recommended. Running all 20 ensures consistent clamping force across your wheels. If you're replacing a full set, use all of these.