[[File:Rtrtyr5yinister.jpg|thumb|Sinister Strings medium]]
'''Kerly Music''' was formed by [[Sean Kerly]], a guitarist employed in the Aerospace field. Being disappointed by standard strings, he decided to improve the way a string feels, sounds and performs. All of Kerly Music strings are seasoned through a patented metal tempering process that exposes them to minus 320F and plus 350F for 24 hours, they call CYCLECOAT™