Add an extra layer of security to your garage door with the LiftMaster 841LM Automatic Garage Door Lock. With a lock on each side this powerful deadbolt lock makes it nearly impossible for intruders to gain entry to your garage. The 841LM works automatically with your garage door opener so it always locks and unlocks with every operation of the door. The model 841LM 12V lock is only compatible with the following garage door opener model numbers: 8550WL, 8587WL, 8360WL, 8500W, 98022

If you have a 3800 or 8500c you need the 24 volt LiftMaster 41A6102 Power Door Lock for 3800, 8500c Operators

WHAT'S INCLUDED

One (1) Automatic Garage Door Lock
Two (2) 1/4"-20x1/2" Screws
33' (10 m) Wire
Template

PRODUCT HIGHLIGHTS

The model 841LM 12V lock is only compatible with the following garage door opener model numbers: 8550WL, 8587WL, 8360WL, 8500W.
It is not interchangeable with the 24V lock used on residential jackshaft garage door opener models 3800, 3900 and 8500.
Add a lock to each side of the door for the best defense against high winds and storms and intruders
The model 841LM is only compatible with LiftMaster garage door openers with the security shield.
One year warranty

841LM Instructions

LiftMaster 841LM Automatic Garage Door Lock 8550WL, 8587WL, 8360WL, 8500W, 98022 LiftMaster 841LM Automatic Garage Door Lock 8550WL, 8587WL, 8360WL, 8500W, 98022