This underbody truck tool box serves as vehicle storage for pickup trucks, RVs and trailers, providing dedicated space for tool arrangement and outdoor placement. Built with Q235 steel material, the structure adapts to complex outdoor environments and supports long-term vehicle-mounted use. It adopts a double door layout fitted with locking T-latch hardware to protect stored items and reduce external loss risk. The surface features weather-resistant treatment to slow rust and corrosion under outdoor exposure. Spacious inner space allows classified storage of maintenance tools and vehicle supplies. The product uses seven-layer cardboard packaging to reduce damage during transit, suitable for professional maintenance personnel, construction workers and outdoor users for daily vehicle storage needs.