Early Black Sabbath albums feature tuned-down guitars, which contributed to the dark feel of the music.[25] In 1966, before forming Black Sabbath, guitarist Tony Iommi suffered an accident while working in a sheet metal factory, losing the tips of two fingers on his right hand. Iommi almost gave up music, but was urged by a friend to listen to Django Reinhardt, a jazz guitarist who lost the use of two fingers.[138] Inspired by Reinhardt, Iommi created two thimbles made of plastic and leather to cap off his missing fingers. The guitarist began using lighter strings, and detuning his guitar, to better grip the strings with his prosthesis, a move which inadvertently gave the music a darker feel".[138] Early in the band's history Iommi experimented with different dropped tunings, including C# tuning, or 3 semitones down, before settling on E♭/D# tuning, or a half-step down from standard tuning,[139] but still play in C# for the songs that require it, such as Children of the Grave.