Refers to the security level of a shredder according to DIN 32757, the official European standard. There are 6 DIN levels (1 - 6) in order of increasing security, reflecting the importance and/or sensitivity of the material being shredded.

See the section in Information on Shredder Security Levels in which the maximum permitted shred sizes at each DIN level are defined. Up to DIN 2, the shredder models are almost all Strip Cut (the Ideal 5009 bulk shredder is an exception, as is the Kobra Cyclone, which does not employ conventional cutter heads). From DIN 3 upwards, they are all Cross Cut.

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