The Peterbilt 384, 386, 387, and 587 Battery and Toolbox Replacement Lower Step is a practical solution for Peterbilt truck owners. Made of stainless steel, this replacement step fits most Peterbilt 384, 386, 387, and 587 trucks. With its durable construction, it ensures long-lasting performance. Sold individually, this lower step is a reliable and convenient addition to your truck, providing easy access to the battery and toolbox. Upgrade your truck with this functional and reliable replacement step.