Liftmaster 841LM Automatic Dead Bolt ( 85502, 8587W and 8360W)

The LiftMaster 841LM Automatic Garage Door Lock is an essential upgrade for residential garages with entry doors, designed specifically for installation on sectional doors with torsion assemblies. This robust lock features a powerful deadbolt that significantly enhances security, making it virtually impossible for intruders to gain entry. Adding the 841LM to your garage door provides an additional layer of protection, with the audible engagement sound ensuring that you know your garage is securely locked. For optimal defense against high winds, storms, and potential break-ins, you can install locks on both sides of the door, a setup that has been engineered, tested, and approved to meet hurricane-ready standards.

Certified as a safe solution and UL tested, the LiftMaster 841LM can be manually released when necessary, offering both security and flexibility. With the MyQ App, you can monitor your garage's security status from your smartphone, providing peace of mind through real-time updates. The lock works automatically with your garage door opener, engaging and disengaging with each operation of the door, ensuring seamless integration and operation.

The LiftMaster 841LM is compatible with select new LiftMaster garage door openers equipped with a Security Shield, including the 8550WL Elite Series DC Battery Backup Belt Drive Wi-Fi Garage Door Opener, 8587W Elite Series 3/4 HP AC Chain Drive Wi-Fi Garage Door Opener, 8360W Premium Series DC Battery Backup Capable Chain Drive Wi-Fi Garage Door Opener, WLED DC Battery Backup Belt Drive LED Wi-Fi Garage Door Opener, and 8580WLB Elite Series DC Battery Backup Chain Drive Wi-Fi Garage Door Opener. It is important to note that the 841LM 12V lock is not interchangeable with the 24V lock used on residential jackshaft garage door opener models 3800, 3900, and 8500. Enhance your garage's security and resilience with the LiftMaster 841LM Automatic Garage Door Lock, backed by a one-year limited warranty.