Manual version of our bullet-resistant shutter for doors. Requirng a tug down, this covers the enitre door from the outside to prevent bullets from entering the classroom. The cover consists of three main layers to protect anyone inside the classrooms. There are 2 layers of .75 inch thick fiberglass and metal on the front and back sandwiching a layer of military-grade kevlar in between. This shade is capable of stopping a .22 caliber bullet round up to a 5.56.