When you absolutely, positively, want to lock a door – Use Positive Lock
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THPA Series

The Positive Lock THPA model is UL Listed Panic hardware, and meets all Life Safety and Building Code requirements.  The THPA model includes a 9 volt battery powered alarm that sounds anytime the door is opened. 

The Positive Lock THPA(WE) model comes with an external horn. The external horn increases the distance that the alarm travels, and may be installed on exterior (exposed to weather) locations.

All Positive Lock models have an (O/A) Outside Access pin on the back to unlock the door from the outside if needed.