Powerful add-on accessory works automatically with the opener. Deadbolt lock reinforces the garage door automatically when the garage door is closed. Performs in tandem with the opener, so it always locks and unlocks.
LiftMaster Automatic Garage Door
Lock For 8360WLB, 8550WLB,
8580WLB, 8587WL, WLED And 8500W,
Please Note, This Device Is Not
Backwards Compatible, Opener Will
Have "Auto Lock Capable" Printed