When you purchase this key, you get to choose which of the 7 items you want. This is not luck based.

In the server, you can choose one of these:

• Enchanted Diamond Helmet

• Enchanted Diamond Chestplate

• Enchanted Diamond Leggings

• Enchanted Diamond Boots

• Enchanted Diamond Sword

• Enchanted Diamond Pickaxe

• Enchanted Diamond Shovel

The armor can give you more protection which makes it easier to survive while the tools can help you mine blocks faster.