These truck tool boxes are ideal for use on flatbed trucks, stake bodies, dump bodies, utility bodies, and flatbed trailers.. 18X18X24 Inch Pro Series Black Steel Underbody Truck Box Corrosion-resistant, and built to last, the stainless steel bolt-on hinge with a 1/4" pin ensures long-lasting use and durability.The locking, die-cast compression latch will provide maximum security no matter how rough the road gets.