Comparison microscope is important in law enforcement, in the fields of criminal forensics and ballistics analysis. It allows bullets and bullet fragments as well as other forensic evidence to be compared with each other, which can be used to prove guilt or to exonerate a suspect in some crimes. The instrument is mainly used in forensic labs, security printing works, banks, industry quality control dept, for comparison investigation of bullets & cartridges case, tool marks, currency, coins, banknotes, documents, stamps, seals, fingerprint, fiber, and more small evidence.