"Durable, heavy duty loading ramps with a maximum 10,000 lb capacity per axle made for pneumatic-wheeled or rubber track equipment. Great for skid loader, tractor, bobcat, ditch witch, and trencher loading onto flatbed or step deck trailers for transport. Extra-wide serrated rungs provide maximum traction with rubber wheels in any weather condition. Maximum 36"" to 42"" load height range."