"Built for service and maintenance of trucks, buses, forklifts and similar, the Guardian Truck Service Ramps are designed for safe access to the underbody of vehicles and equipment. Sold as a pair, these service ramps are manufactured from durable steel and support a total weight capacity of 40,000 lbs. Engineered for easier maneuvering, each ramp features a pair of hidden wheels that activate with a retractable handle and can be raised up or disengaged when the ramp is ready to be used with a vehicle. Each ramp accommodates tire widths up to 15.5""."