Since 1936, Krieger Specialty Products has been a leading manufacturer of high-performance doors and windows for special purpose applications—including acoustical, blast and pressure, bullet and forced entry, radio frequency, and more. Custom built to meet precise specifications for size, finish, and performance, Krieger products have been the choice for premier structures all over the world. Krieger is proud to be part of the Allegion™ family of innovative security products and solutions