Helicore Octave violin setHelicore Octave violin strings are designed to be played one octave below traditional violin tuning, which allows for new tonal and stylistic possibilities. These strings utilize the same core technologies as the Helicore violin strings. This string set is considerably thicker than traditional violin strings, and as a result, they require extra care to ensure proper installation. Helicore violin strings are crafted with a multi stranded steel core,