Resistant Doors are used in banks, financial and government buildings, gas stations, cash centers, and high crime areas. These doors and windows come in a variety of grades and are rated to resist penetration from .22 caliber bullets to mortar shells. Bullet Resistant Glass is the most common protection for fixed windows or glass/metal doors. Most metal frame doors can accept bullet resistant glass. Whatever your needs are, CDSI can recommend a door to accommodate almost any commercial building with a Bullet or Blast Resistant requirement.