Magnetic door lock strip is made of quality magnetic material, each with high density magnet and PVC top layer, will not damage your door, and can be applied repeatedly for a long time You will receive 60 pieces of lockdown magnetic strips for school lockdowns; You can use them at home or take them to your office and school; They can meet your daily needs, the strips measure about 20 cm/ 8 inch long, 4.5 cm/ 1.8 inch wide, 0.8 mm/ 0.03 inch/ 30 mil thick, suitable for most metal door frames, and the small size will not take up too much space for storage Lockdown magnetic strips are easy to use; Just place them on the latch, then open and shut the door as usual; They can also effectively prevent doors from locking accidentally,with these security systems, you don't need to waste time turning knobs or using keys to lock or unlock the door Magnetic door latch is suitable for schools, hospitals and office buildings; It can also be applied at home for children and pets rooms; With these security magnet strips, you can conveniently open and shut the door Magnetic door strip is only suitable for metal door frame, not for wood, glass and plastic door frames, so please confirm the material of your door before ordering; Although the magnetic tape performs well, it is also necessary to avoid high temperature and strong impact, which will otherwise affect the magnetic performance A pack of 6 tablets, a box of 10 packs is a total of 60 tablets This product is not intended for children 13 years of age and under. Features: If you hate that the door has to stay locked and getting interrupted with so many times the door has been opened and closed, the magnet door locks make an easy way to keep the problems away. The magnetic strips work not only well for room doors, but also for metal windows, as magnetic strip for shower door, and other places of metal frames that need to open and close frequently.