841LM Automatic Garage Door Lock

I ordered two of these for my garage, due to a slew of break ins in my area. Gotta say these things are awesome, and it's always cool to hear your garage door locking like a vault. The installation was fairly easy, but you do need some specialized tools for it. I don't even know what it's called, but is a drill bit that gauges up as you drill a hole in the track of the garage door. Use the template, measure, and then measure again. I almost messed up and had one of the bolts hitting the wheel on the garage door. Don't do what I did. Make sure there's enough clearance between the garage roller and template before you start.

As described. Works well

Safe and sound

Was delivered on time, and I had no problems installing on track. My garage track already had the predrilled holes on them, so all I had to do was screw the device in. The lock works great, easy to install and I will buy a 2nd for the other side. I recommend this lock if your LiftMaster has the shield icon, it does add more security to the garage door from being lifted. Once I press the garage button, the lock automatically unlocks and when it’s closing, the bolt engages and locks.

Defective product sent and seller would not return product