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Always verify compatibility using your parts diagram or manual
OEM-grade reliability for long-term performance
Key-protected manual release for emergency access
Long-Range Performance: Transmission range from 50 to 700 meters in open space for flexible installations
LiftMaster 841LM Garage Door Lock arm-assembly Always verify compatibility using yourDeadbolt Security Lock for LiftMaster Garage Door Openers The LiftMaster 841LM is an automatic garage door lock that enhances perimeter protection by reinforcing the door with a powerful deadbolt every time it closes. Designed for seamless integration with compatible LiftMaster openers, this lock engages and disengages in sync with the motorized cycle, creating a secure, tamper resistant barrier. When paired with two locks, it meets two point locking
