>> reporter: the can be fitted osier a hydraulic door closer if ever there's an intruder in the hallway. keeping the door locked and preventing a gunman from gaining entry. >> in lieu of trying to get all of the school doors with dead bolt locks on it, this is a quick, practice takal way of doing it. >> reporter: like in many scioli across the country, schools cannot be locked from the inside for fire hazard reasons. at sandy hook elementary school last december, one teacher had to lock her students in a bathroom to protect them from 20-year-old gunman adam lanza. >> the recent shooting at another school where the shooter broke into the building and shot a lot of kids, it inspired us, because it -- the doors aren't that secure. >> reporter: students here were recently awarded a $6,600 grapt from m.i.t. to develop a final version of their device. >> we're not ready for an ipo