Consider replacing it with a locking latch and doorknob instead of a standard push-button handle. A doorknob doesn’t have the tendency to break off and, if it’s equipped with a keyed lock ...

The EVERLOCK™ is a new self-locking damper handle. According to the company, until now, balancing technicians needed a tool to unlock a damper handle, adjust airflow, and to tighten the bolt again.