# Details

* Additional options can be opened sequentially from slot 1 to slot 3.<br>
* When using stones&#x20;
  * The contents of each additional option are all changed in batches.&#x20;
  * The ratings of each additional option does not decline.&#x20;
  * Probabilities are applied for each option slot.<br>
* Display Option Rates
  * Option ratings are displayed in border color.&#x20;
  * The border color is based on the most rated option you have.&#x20;
  * In the future, we will add a rating mark to consider the ratings of all options.<br>
* Restricting Stone Usage&#x20;
  * If shoes are on sale, stones cannot be used for those shoes.&#x20;
  * Other than that, if you are leveling up or minting, you can use stones.&#x20;
  * Stones can be used even if the durability of the shoes is not 100.<br>
* When purchasing stones, you can enter the number directly and purchase as many as you want.<br>
* If the Shoe quality upgrade succeeds using a rare, Epic coupon, the options will be locked again.<br>
* When trading shoes in an external NFT marketplace (Pala Sqaure, OpenSea, etc.), the option type is displayed as metadata. \
  There may be confusing expressions, so please refer to the option metadata page below when using the external market.&#x20;
  * Metadata can be renewed if shoe NFT is withdrawn to Wallet.

{% content-ref url="metadata-of-the-option" %}
[metadata-of-the-option](https://docs.superwalk.io/english/game-fi-elements/additional-option/metadata-of-the-option)
{% endcontent-ref %}