Do these bolt to factory holes or do I need to drill?

These mount at your truck's factory rocker panel attachment points — no drilling. You'll need basic hand tools and fasteners rated for outdoor automotive use; the listing doesn't confirm what's in the box, so verify hardware before you start.

Will the chrome finish hold up year-round or does it need maintenance?

Chrome can spot from road salt and moisture. Rinse regularly in winter months and dry when you can. The black portion is more forgiving; either way, treat it like you would OEM chrome trim on your truck.

Can I return these if the fit isn't right once I open the box?

Contact ModSupply directly with photos and details — they'll walk you through your options. Returns depend on condition and timing, so reach out as soon as you know there's an issue.