Bullet Resistant Interlocking Package Exchanges from Protective Structures, Ltd. can be used for both interior and exterior applications and can be installed as an integral part of the window system, or by itself into a wall and are available in models specifically built for passing money, drinks, trays or pizza.
Interlocking package exchanges are most often found incorporated into a walk-up night window at a gas station or convenience store, or at a teller station in a bank or post office.
Custom sized package exchanges are also available in protection levels 1 – 3.