Rail Skate, 85-141 lb Rail Made from Heavy-duty Cast Special Ductile Alloy. Designed to carry car wheels and prevent flat spots or other damage as a result of excessive application of hand brakes. Fits rail heads between 2-1/2" and 3-1/16" in width (85-141 lb rail sizes). Easily handled by one person, yet are tough and durable enough to meet track yard car handling requirements. Easy to Apply.