The Automatic Flush Bolt is a high-performance locking device designed for commercial doors, featuring a 1.5-hour fire rating and a million-cycle lifespan for high-traffic reliability. It operates automatically—locking when the door closes and unlocking upon opening—eliminating manual effort. With a non-handed design for flexible top or bottom installation and a 1/2-inch vertical adjustment for alignment, it is an ideal security solution for fire and double doors.