Will these bolt straight to my factory fog light holes?

Yes. These mount at factory anchor points with no drilling needed. If your vehicle came with fog lights from the factory, installation is a direct swap.

Do I need to buy wiring harnesses or bulbs separately?

Wiring and bulb compatibility depend on your specific vehicle's electrical setup. Verify connector type and bulb size against your owner's manual before checkout to avoid returns.

Can I install these myself with basic hand tools?

Mounting is straightforward with a socket set and screwdriver. The wiring step varies by vehicle—some plug directly in, others require splicing into existing circuits. Consult your service manual for electrical routing specific to your model.