Does this mount at factory rocker points or will I need to drill?

These mount at factory points — no drilling required. Test-fit before final fastening to confirm your specific year configuration.

Will the mirror extend far enough to see my trailer clearly?

Manual mirrors give you full adjustment range to dial in the angle you need. Your sight line depends on how far out your trailer sits, so test the width during your first tow.

What fasteners do I need to mount this?

Mounting hardware is not included — bring fasteners and brackets that match your factory attachment points. Your truck's service manual will confirm size and torque specs for those fasteners.