The Blue Line Handcuff Key Display holds 24 individually carded shirt pocket clip keys. These distinctive duty keys have a black anodized aluminum body, stainless steel shaft, stainless double lock pin, spring steel pocket clip and injection molded thin blue line ring. A BackSet release flag allows rapid location of the handcuff keyway. These keys are designed to withstand the rigors of long term duty use. ASP Blue Line products pay tribute to the critical role that law enforcement plays in safeguarding citizens in our society. The police are said to be the "thin blue line" that protects the public and maintains order.Blue Line Keys denote police pride and commitment. They symbolize the relationship of law enforcement with the community it protects. The term "thin blue line" was first used in referring to the police by LAPD Chief Bill Parker in the 1950s. In a department produced television show, Parker explained that the purpose of the police was to serve as a barrier (a thin blue line) between the public and anarchy.