"I found the top of a Rubbermaid container and measured out geometrically the shape I needed and cut out five pieces," says Nietzel, a middle school teacher and President of Fighting Chance Solutions. "Then I got out the hot glue gun and on my work shop table in the basement, hot glued it, and let it dry."
His simple household materials turned into an unbreakable steel piece. It slips quickly on a door's closer arm and prevents up to 600 pounds of force. He created this after all the tragic school shootings to protect students in the classroom.
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