The Harry Fox Agency (HFA) is a provider of rights management and collector and distributor of mechanical license fees on behalf of music publishers in the United States. HFA has over 48,000 music publishing clients and issues the largest number of licenses for physical and digital formats of music. It was founded in 1927 by the National Music Publishers Association. HFA provides the following services to its affiliated publishers: Songfile® is an online mechanical licensing tool designed for the D.I.Y music industry market. It allows the public to search through over millions of songs and purchase licenses. A mechanical license is needed if one wants to manufacture and distribute recordings that he or she did not write. Through Songfile®, licenses can be obtained for physical works, permanent digital downloads (PDDs), ringtones, and interactive streaming distribution. Users pay a low per-song processing fee and royalties for licenses, which are set at the current U.S. statutory rate.