Does this mount at factory points or require drilling?

Mounts at factory attachment points — no drilling needed. The fit is engineered around existing crew cab geometry.

Will this interfere with rear seat movement or passengers?

It's designed to sit underneath the bench, so seat operation stays normal and passenger legroom isn't compromised. Test-fit to confirm clearance in your specific cab configuration.

Does it come with a locking mechanism?

The box includes a lockable design, but confirm hardware specifics before install — you may need standard padlock hardware depending on your security preference.