Westins HDX Drop Wheel - to - Wheel Nerf Step Bars feature a notched bar design with a 3rd step location for easy bed access. They provide strong traction with over 2 inches more of toeheel step area than our Westin's HDX Drop W2W Nerf Step Bars include an added 3rd step location for easier bed area and cargo access. HDX also boasts more than 2 inches of added toeheel step area which far exceeds all other competitive brands. HDX's notched bar design construction results in a reliable long lasting Bar, with a solid fit and a rugged look. The added length of HDX Drop Wheel - to - wheel Nerf Step Bars provides users with better cab access and better footing and traction for both drivers and passengers. Product includes mount kit and is offered in a variety of vehicle specific applications. Bolt - on installation so no drilling required. Mount kit included. Westin's exclusive Isolator Bracket supports the step bar past the truck cab, a feature that competitors do not offer. Without an Isolator Bracket, the step area that extends past the vehicle is left unsupported. Our unique design provides extra bed support without resulting in annoying creaking sounds.