QUICKLY SECURE THE ROOM Lock your doors in a jiffy with these magnetic door lock strips. With these safety systems in place, you won't waste time turning knobs or using keys to lock your door. UNIVERSAL DOOR SECURITY DEVICES Not sure if these door magnets will fit? Each of our door security strips measures 0.03-inch thick and will work great on standard-sized metal door frames. EASY APPLICATION These magnet strips are simple enough to use. To use, lock your door, place the magnet strip over the door latch, and use your door like you normally do. No complications! MADE TO LAST Count on our classroom lockdown magnet door strips to last a long time. Each one features a high-density magnet and a durable PVC top layer that won't damage your door mechanism. Secure your door in an instant. Add the Maxmagnetics Magnetic Lock Strips for Door Frames to your cart NOW! In the event of a school lockdown or emergency, every second counts. When you find yourself in the midst of a lockdown, the first thing you do is to get inside a room and lock up the door. In the heat of the moment, however, you end up fumbling with keys to lock the door. Worse, you find yourself struggling with complicated door latches. For these unnerving situations, the last thing you want to deal with is a door that takes forever to secure. What you need is a quick and effective way to lock the door so you can get to safety much faster. Lock the door in a split-second with the Max magnetics Magnetic Lock Strips for Door Frames. · No installation required: Step 1 -Lock the door & cover latch with magnetic strip. Step 2 – Open and close locked door with magnetic strip in place. Step 3 -In case of lockdown or emergency, remove lockdown magnetic strip and close door.