Will these bolt directly to my truck without any drilling or modification?

Yes. These mount at factory rocker points on the double cab—no drilling or custom brackets required. Just bolt them down with the included hardware.

Do I need to do any prep work on the finish before installing?

The powder-coat comes ready to install. Clean the mounting surface on your truck with a degreaser to ensure a solid fastener grip, but no sanding or primer is needed.

Are these bars strong enough to step on, or are they just for looks?

They're functional step bars. The 3" tube diameter and steel construction are designed to handle daily stepping and minor bumps, though they're not rated as rock sliders or heavy off-road protection.