Do I need a special socket to install these?

Yes — spline lug nuts require a spline drive socket that matches M12 x 1.25. Standard conical or ball seat sockets won't work. Pick up the matching spline socket separately if you don't have one.

Will these fit my wheel without spacers or modifications?

These are designed for deep-dish and offset wheels where standard lug nuts interfere. If your current nuts thread on smoothly, test-fit one nut before committing to the full set — wheel lip clearance depends on your specific rim depth and offset.

How do the lock nuts work?

The lock set uses a mechanical design to resist loosening from vibration and road conditions. Tighten lock nuts the same way you would standard lug nuts — refer to your vehicle service manual for torque specs specific to your application.