Product Details: Ensure your semi truck's wheels are Ready for the Road Ahead™ with enhanced protection against oil, dust, and debris, with the Stemco 6-Hole Hub Cap. By attaching to the external frame of a wheel, this removable hub cap protects the lug nuts, bolts, and axles from harmful roadside materials. Constructed with sturdy metals and a streamlined design for an easy-to-install or remove process. FleetPride is your First Click in Heavy Duty®.