No Life 'til Leather was recorded on July 6, 1982. It is Metallica's most widely circulated demo tape. All of the tracks are early recordings of songs that would later appear on the band's debut album Kill 'Em All. The track listing on Kill 'Em All is the same as that on the demo tape, with the exceptions of Cliff Burton's bass solo "(Anesthesia) Pulling Teeth", "Whiplash", "No Remorse" and "The Four Horsemen". The title of the demo comes from the first line of "Hit the Lights".
The demo has been re-released twice unofficially, first under the title of Metallica: Bay Area Thrashers, and was alleged to be a live bootleg recording of Metallica in the early days, however all "live" sounds had been added from various sources including the Metallica video Cliff 'Em All. This was soon discovered by Metallica and all copies were removed from stores. The demo was re-released a second time under the title Metallica: In the Beginning... Live, containing no apparent differences from Metallica: Bay Area Thrashers.