1.8M views · 4.4K reactions | Nightlock demonstrates their simple door barricades, to help quickly lockdown a school in case of armed emergency.  nightlockdoorbarricade / IG | Interesting Engineering | Facebook
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Simple Tool To Protect Students NIGHTLOCK® Door Security Device acts as a Barricade / DOOR JAMMER. The barricade is inserted into the door and floor plate, making the door impossible to open. Credits: @ nightlockdoorbarricade / IG #tech #technology #engineering #innovative #reels | Tech Moments
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