Will these bolt directly to my factory mirror mounting points?

Yes — these mount at factory locations with no drilling required. Your existing hole pattern will accept the base without modification.

How does the heating element get power?

The wiring harness taps into your truck's electrical system. Route it through the door jamb and connect to an available 12V source; refer to your service manual for the exact connection point on your model.

Are these mirrors larger than my original ones?

Yes — towing mirrors have a convex design and wider glass area to give you a bigger view of your trailer and blind spots. They'll hang slightly farther out than OEM mirrors, so confirm clearance at your mirrors' full extension before frequent low-speed maneuvers.