Ernie Ball Slinky strings are used by legends around the world, like Jimmy Page, Metallica, Eric Clapton, Slash, etc. Hybrid Slinky strings bring together the lower strings of the Regular Slinky and the upper strings of the Super Slinky, giving musicians slightly less tension on the high strings ideal for manipulation and solos. Element Shield packaging preserves the quality of the strings so that they retain the same properties as they were when they were produced. Clear and balanced sound. Made in the USA, California, with the finest materials.