Cast iron caster wheels are a durable, economical solution for the toughest warehousing and manufacturing applications. Composed of long-wearing gray iron, they resist abrasion, chemicals, shock, and extreme heat. These wheels are best for rough surfaces where floor protection is not a priority. This caster's swivel rig aids maneuverability through turns, and the top lock prevents rolling during loading, unloading, and other operations where stability is required.