This heavy-duty aluminum semi truck step is designed to bolt onto the frame rails of semi trucks, providing a sturdy and reliable platform for easy access. Manufactured in North America, this step is available in two widths: 8 inches (20.3 cm) and 12 inches (30.5 cm), allowing you to choose the most suitable option for your specific application. Please note that this step does not come with pre-drilled frame mounting holes, so you will need to drill holes into both the step and your truck's frame for installation. This permanent modification means the product cannot be returned once drilled. Whether you're a professional trucker or simply need a reliable step for your semi, this durable aluminum step offers a practical solution for safe and convenient entry and exit.