Upon purchase, you will receive access to the /fix hand command, which allows you to repair the item in-hand, even if it's enchanted.
Command: /nick
Upon purchase, you will receive access to the /nick command, which allows you to customize your in-game display name.
Command: /fix all
Upon purchase, you will receive access to the /fix all command, which allows you to repair all items in your inventory, including enchanted and equipped armour.
Command: /fly
Upon purchase, you will receive access to the /fly command, which allows you to fly around the server.