Sometimes people, companies, just dont need to have something that heavy duty. So we took the design of the 3 bar carts and decided to lighten it up! Instead of full 1 1/4″ construction, we “dumbed it down to 1″ overall square tubing and 4” grey non-marking casters. Still can handle a good amount of weight (over 1000 lbs), but is a much lighter version to roll from place to place