The map comes with 257 random items programmed in, ranging from random miscellaneous items like a potato or potion to actual tools and weapons. I even mixed in a missing texture block and a golden apple!
The wheel first displays the twelve items selected to be placed up for distribution, then it sends players to boxes facing wool pillars and the wheel will spin. Whatever color comes to a stop in front of the box you are in is what you get! If there was a potato on the red wool and you spun that, then you'd better hope nobody else gets a sword...