# Lockability Locking a collection sets a permanent limit - determined by the Collection Owner - to the amount of NFTs that can be minted in a Capsule Collection. Once the limit about has been reached, no one, including the owner, can mint any more NFTs in the collection (*see Example #1*). After creation, a collection may be locked at any time by calling the *lock* method and passing in a numerical upper bound. Please note that the Owner can only pass a numerical upper bound that is greater or equal to the current NFT count (*see Example #2*). Both private and public collections can be locked at any point by the owner of the contract - *but never unlocked*. To permanently prevent a collection from being locked, please use of the following methods: * Set the lock number to the maximum unit 256 minus one (2^256 - 2) * Transfer ownership of the unlocked collection to the 000 address {% hint style="warning" %} During Beta, Capsule Collections *can only be locked from the backend*. To view the developer walkthrough, please read [Developer - Managing a Capsule Collection](/capsulenft/developer-walkthroughs/developer-managing-a-capsule-collection.md). The Capsule team is working towards improving this feature for the future. {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.capsulelabs.xyz/capsulenft/overview/capsule-collections/lockability.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.