The heavy duty ramps are manufactured from lightweight, rust-free, aircraft grade aluminum that can hold vehicles with a rating of 12,000 lbs per axle. The aluminum ramps feature a 2-beam design with extra wide, serrated cross bars that provide maximum traction in the rain, mud, or snow. A tapering knife foot provides a gradual and smooth transition from ground to flatbed or gooseneck trailer. These heavy duty commercial ramps feature an extruded 90° hook end. The "02" pin on ends require skid seat ramp attaching brackets (sold separately). Also available are ramp wall brackets for loading skid steers and Bobcats into basements!