CLEVELAND, Ohio — An Ohio woman's advice on social media about keeping a door stop in a child's backpack in the event of a school shooting has gone viral.

Katie Cornelis wrote that she gave her nieces a door stop to keep in their school bags after the 2012 school shooting at Sandy Hook in Connecticut that left 20 young children and 6 faculty members dead.

"It truly pained me when I handed it to them, and I didn’t want to scare them, but it was out of love and they understood," Cornelis said in the post. 

"Sure it’s small, but it can be powerful in keeping you safe if you ever have to barricade yourself in a room. If a gunman shoots out the door lock it will still keep the door from opening and may just buy you some time," she goes on to say. 

Her post on Feb. 15, shared the day after the latest Florida high school shooting, already has nearly 1.4 million shares on Facebook as of Tuesday morning.