Chicago color coated cutaway training handcuff. This single cutaway handcuff is constructed with a clear plexiglass cover allowing the user to see the internal lock works in action. This tool is helpful in recruit training so new police officers fully understand their equipment. These are also used in military applications to train in the art of lock picking. The color coded lock works help both the instructor and trainee in identifying the proper parts. This handcuff cutaway is superior to all the other cutaways on the market. It opens with a standard handcuff key (these cutaway handcuffs are the only ones on the market that take a standard US handcuff key) and this is the only one with color coated lock works.