Constructed of 4", oval tubing with 4" wide injection molded polymer step pads Protects vehicle rocker panels from potential damage Steel construction with 30 degree factory style bends at each fully-welded dome end Bolt-on installation and mount kit included - no drilling required on most applications Westins Pro Traxx 5 Oval Nerf Step Bars feature a 5in. oval tube with a heavy-duty step pad that provides a wider and more secure step area. They feature 30 factory style bends that have seamless domed ends so there are no end-caps or exposed bolt heads. Applications are bolt-on installation