> For the complete documentation index, see [llms.txt](https://docs.tektools.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tektools.app/tektools-nfts/evolution.md). # Evolution One way to increase your earnings with Tektools is to evolve your **Toolbox**, you can increase the level of your **Toolbox** up to a max level of 10. **Increased levels earn higer rewards.** \ You can also personalize your Toolbox garage wall with NFTs of your choice, enhancing its appeal for yourself and others.\ \ See below an updated and customized Level 3 Toolbox!

You can see 4 big collections and a sneak peak of our upcoming PFP in this customized toolbox.

**Leveling Process**: To level up an NFT, holders need to stake NFTs to earn **$SALT** token. Every 20 days, holders earn enough **$SALT** to evolve an NFT to the next level. The progression yields a higher multiplier, maxing out at a 4x multiplier. For instance: * Level 1-2: 1x multiplier * Level 3-55: 2x multiplier * Level 6-9: 3x multiplier * Level 10: 4x multiplier