What does the SR rating mean?

According to the LPS 1175 standard, the Security Rating (SR) relates to the security level at which the roller shutter is certified to and the level to which it meets the loss prevention standard. For security shutters, these security ratings range from SR2 (the lowest) to SR5 (the highest).  HAG Insurance Roller Shutters are specifiable with security ratings SR2, SR3 and SR4.