This allows the player to duplicate any item of their choice. All you need is the item you want to duplicate and any belt item.
1. Put the item you want to duplicate on the ground 2. Walk away from it but keep it on the screen 3. Click on the item (this should make you walk back towards it) 4. At the exact same time you pick it up, click on a belt item. (You should have picked up the item anyway.) 5. Open your inventory 6. Put the belt item in an empty space in your inventory. If done correctly, your belt item should become the item you wanted to duplicate once in the inventory.