Do these mount at the factory rocker points or do I need to drill?

These use factory mounting points on the extended cab — no drilling required. You'll need basic hand tools and a socket set to secure them.

Will these boards rust if I don't seal them?

The black finish provides corrosion protection for normal use. If you're in a heavy salt or wash environment, inspect the underside periodically and apply a touch-up if bare spots appear.

What's the weight capacity of these boards?

These are designed for step-and-grab duty during cab entry — not for standing loads. Treat them as access aids, not platforms for tools or equipment.