The seller explained that this lock core uses a springless blade structure, so it's normal for the beam to be loose, and it's a beautiful lock and better protected from theft, which is a medium- and high-grade product. I don't know
When used, pay attention to the direction of the key insertion: the key is forced to be unlocked without the key being inserted at the end, causing the key to die and the key to be pulled or broken. The key cannot be removed while it is being rotated, but only after the key is locked in reverse timewise。