This Freight Car Wheel Stop is cushioned to absorb the force and spread the impact force into the ties and ballast upon contact. It is made of solid steel pieces welded together that comes with 2 each 1-1/2 In. bolts, 2 nuts and lock-washer which allows easy clamping to the rail with NO drilling required. It fits 85# thru 141# rail and weighs 180 lbs.