Update your semi truck with increased storage space, with the Buyers 18" x 18" x 48" Steel Underbody Truck Tool Box that ensures you're Ready for the Road Ahead™. Due to its secure design, this replacement box is able to offer an additional space to store tools, equipment, backup materials, and important items. Constructed with a weather-resistant and durable body to tolerate extreme conditions. FleetPride is your First Click in Heavy Duty®.