Our yel-Low Safety Dolly is made famous by its low profile. This innovative design allows for easy loading and unloading, as well as, less worry of tilting and falling over.The yel-Low Safety dolly has 18 possible post positions vertically and 8 positions horizontally. Vertical posts are mostly used for steering or securing the load in place, the horizontal posts, however, increase the surface area of the dolly so you have more room to load product. This increase in surface area can only go so far though. That is why we came up with the Shuttle Dolly. The Shuttle Dolly offers all the versatility and ease of use as the yel-Low but with a larger base. 40% Larger!!!