We take quality seriously here at Dee Zee. It's kind of our thing. Our Nerf Steps are no exception. These tubular side steps are constructed of 4 in. oval black steel and designed to provide a larger stepping surface for secure footing, even in less than ideal conditions. The design provides a larger stepping surface to ensure safety for everyone who uses it. Molded plastic step pads and a larger stepping surface offer secure footing, even in less than ideal conditions. The 4 in. oval Nerf Bars feature hidden sturdy steel bracing to provide a cleanly styled bar. The mounting brackets are powder coated to help prevent rust and keep the tubes feeling strong and solid. Don't worry, you don't need to drill your baby. The 4 in. oval black steel step bars are custom fitted for each vehicle to eliminate the need for drilling during installation.