Thomastik-Infeld Classic S KF110 Soft Steel / Flat-Wound Acoustic Guitar Strings

The Thomastik-Infeld Classic S KF110 set delivers an exceptional alternative for acoustic, concert and fingerstyle guitarists seeking the feel of soft steel with the clarity of flat-wound strings. With gauges .010 / .014 / .018 / .024 / .031 / .038, the set features a plain steel 1st string and chrome flat-wound strings on a flexible steel core for the remaining five strings. Engineered for smooth response and low tension, the KF110 offers an articulate tone with minimal string noise—ideal for players focused on refined fingerstyle, expressive nuance and vintage character.

Key Features

• Gauge: .010 / .014 / .018 / .024 / .031 / .038
• Construction: Plain steel 1st string (.010); Chrome flat-wound strings on steel core for strings 2–6
• Tone: Smooth, articulate, low string noise; excellent for concert and fingerstyle settings
• Ideal For: Acoustic and concert guitars, fingerstyle players, performers seeking elevated tone quality