The R5 series features extra long non slip step pads that are 5 wide for plenty of traction so you will feel secure when entering and exiting your truck You can illuminate your step and door sill area by adding the optional R5 LED end caps This adds even more safety when getting in or out of your truck in dark areas and at night The solid state relays fit under the bars and are built to stand up to the elements, and are activated by magnetic switches when you open your door The wiring harness is included with this optional end cap kit Each set of R5 Modular Wheel to Wheel Nerf Bars come with injection molded bracket covers to top off the clean look that Westin delivers Add unparalleled support to the bed access step with Westin's isolator bracket This proprietary bracket attaches to the bed and prevents bending or bowing when using the rear step, so you will feel safe and secure