Template:Lock

lock should be used on pages in the main article space which have been protected against all non-administrative editors. Note that placing it on a page that has not actually been protected by an admin will have no effect. In other words, if you're not an admin, you shouldn't be using this template.

Template classification
This template is deliberately classified as "unknown" so that it will show up on a variety of devices, including phones. This is different from the policy used for the similar-looking stub tags, which we class as "notice" templates.