YORK COUNTY, S.C. -- Members of the SWAT team fired rounds from a 9mm pistol, AR 15, and FN scar rifle into a bulletproof door.

None of the bullets were able to penetrate the door or the glass.

Pegasus Steel CEO Tony Deering believes these doors could prevent mass shootings like the one we saw in Parkland Florida.

“That would have never occurred in an instance where the protective door solution was employed,” Deering said.

His company, based just outside Charleston, has spent the past four years building, tweaking and testing these doors.

They were finally about to demonstrate their strength in front of lawmakers who are feeling the pressure to improve school safety.

“I’d love to see these in every entrance, every school, classroom door. We’ve got to do a better job on that preventative side,” said S.C. Rep. Nancy Mace.

Other local school districts are not waiting on lawmakers to act.

Last fall, the parent-teacher organization at Central Elementary in Iredell County raised $10,000 to purchase more than 50 fortified doors, one for each classroom.

“The teacher can actually shut the door, activate this device. And it renders the door impermeable for someone trying to get in,” said PTO President Stacy Campbell.

And in addition to locked doors, key card access only and security cameras the Rock Hill School District has begun to equip teachers with these emergency kits complete with whistles, tampons to stop bleeding from bullet wounds and tourniquets.

That bulletproof doors cost just under $4,000 and last 25 years.

The CEO said in a classroom of 25 students, that’s about four cents per student per day.