Will these fit on my factory wheels or do I need adapters?

These are M12x1.5 thread — the most common size on street cars and trucks. Test-fit one on your wheel before committing to all twenty to confirm thread match and seat type compatibility.

Do I need to torque these to a specific spec?

Refer to your vehicle's service manual for the proper torque specification. The knurled grip helps you hand-seat them, but final torque should always be checked with a wrench to factory spec.

Can I use these on different wheel sets or will I need new nuts each time?

Twenty pieces gives you a full set for most four-wheel vehicles with spares. If you rotate through multiple wheel sets, you'll use the same nuts — no need to buy additional sets per wheel.