"Safely load and unload containers with forklifts or pallet jacks using the 48"" x 36"" HD Ramps Punch Plate Shipping Container Ramp. The extruded truss design in high-strength, lightweight aluminum gives this ramp their heavy-duty 8,000-lb per axle weight capacity. The raised punch plate surface provides consistent, permanent traction for equipment and personnel in icy or wet weather conditions without becoming slippery, and the knife foot creates an easy ground-to-ramp transition so that pallets won't be jostled on your equipment by sudden bumps. This ramp works with container edges from 4.5"" to 8"" H, and are proudly made right here in the USA with a patented truss design."