The following tables illustrate the available levels of security which are available. From burglar proof to bullet proof.
Security level A3 (DIN 52290 T4) 10mm/3/8" UL 972
Security level B1 (DIN 52290 T3) 18mm/3/4" UL 972
Security levels C1 through C5 (DIN 5229 2C) UL 752 1-8
Security levels A3/B1
Equivalent to EN 356/UL 975 rated impact resistance. Creating a barrier that deters intrusion and protects your home. Also ideal for extreme weather such as hurricanes and tornados to protect from flying debris. The DIN standards surpass the Dade county Florida large missile test such that the impact of a steel ball has a more concentrated force than a 2 X 4's surface area.