"Heavy duty 120""L x 20""W pin-on attaching loading ramps for loading vehicles weighing up to 5,000 lbs per axle, with a maximum 8,500 lb total vehicle weight. Built strong for loading cars, pickup trucks, SUV's, wheeled equipment, and small commercial equipment in any weather condition. The pin-on style ends are designed for use with steel and aluminum skid seat attachment brackets, which bolt or weld to the truck trailer deck, and are sold separately. The strongest, lightest ramps available! All-Aluminum construction Made in the USA by certified welders."