Ernie Ball 2726 Cobalt Power Slinky Electric Guitar Strings are engineered to maximize output and clarity giving you the latest innovation in technology to get the best tone from your instrument. Seeking to provide guitarists and bassists with a new voice, Ernie Ball Cobalts provide an extended dynamic range, incredible harmonic response, increased low end, and crisp, clear highs.Cobalt provides a stronger magnetic relationship between pickups and strings than any other alloy previously available. They're great to the touch making bends and vibrato a breeze!The Not Even Slinky gauge gives you the option to tune your guitar really low but still maintain a good amount of tension. These are perfect for metal styles where you need tunings like drop B or even A!The individual thicknesses are: 12, 16, 24p, 32, 44, 56. They're for sale with free next day UK delivery so get them fast and get your riffs blasting out in no time!