This 48-inch aluminum tool box is a durable, versatile storage solution for heavy-duty truck beds, outdoor trailers, pickups and RVs, also functioning as a lockable underbody box. Crafted from premium aluminum, it offers high intensity and corrosion resistance, effectively shielding tools and equipment from moisture, dust and minor impacts-ideal for long-term outdoor or heavy-duty use. Despite its robustness, it's lightweight, adding no extra weight to tractors, trailers, trucks or RVs to avoid unnecessary vehicle strain. The 5-bar tread pattern reinforces the aluminum, boosting sturdiness to withstand daily wear, rough roads and frequent use. Measuring 48"(L)x15"(W)x15"(H), it provides ample space for various tools, accessories and small parts, suiting home use, garage organization, DIY projects and professional tasks. It supports versatile mounting: easily install on hitch racks, camper cargo racks, enclosed trailer tongues or RV rears to maximize unused space. Equipped with a lock and 2 keys, it keeps tools secure from theft or loss; the seal ring design creates a tight seal, blocking water and dust to keep interiors clean and dry, preventing tool rust or damage. Easy to install without complex tools, it balances storage and space efficiency-perfect for truck drivers, RV owners or DIY enthusiasts needing reliable storage. Color: Black.