BULLETPROOF DOORS

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FB₄ bulletproof doors are resistant to different calibers of short-range firearm ammunition. They are security doors designed to absorb gunfire.

They are made from high-hardness ballistic steel, with different types of armor plating, various thicknesses, and different resistance levels.

Bulletproof doors have a high-density rock core and are built with one or more steel sheets. Their complexity makes them the hardest door model to break into, as they feature an anti-lever system that locks the door to the frame structure, making them impossible to force or tamper with.