"Powerful magnet pick up nails, wire and other metal objects that can damage tires or injure people. Also great for construction site, warehouse, factory yard or airport runway. Easy to suspend under a vehicle, 1 1/2in. to 3in. above pavement. U.S.A. Load Release No, Lift Capacity lbs. 400, Overall Dimensions L x W x H in. 72 x 5 x 2."