My AccountView Cart
Specials Mailing List

Thomastik-Infeld Steel/Nickel Flat Wound Light Steel Core, .010 - .038, KF110

Thomastik-Infeld Steel/Nickel Flat Wound Light Steel Core, .010 - .038, KF110
Manufacturer Part #:

  1. Product Reviews
  2. Description
  3. Recently Viewed Items
9 Reviews
100% (9)
0% (0)
0% (0)
0% (0)
0% (0)
0% Recommend this product (0 of 9 responses)
By Paul
June 12, 2018
by far the best strings
Classic S Flatwounds
April 10, 2015
Always preferred wound 3rd string, but having wound 2nd is heaven! Only set of strings I have bought in 50 years that sound great, feel great, have perfect intonation, hold tune immediately, and yet have the tension of round wounds. Naturally, also the most expensive I have ever bought, but well worth it. I love em! Got to spring for 2 or 3 more sets now. I used them on a PRS Custom 24. Great for any kind of music! Be sure to wind cloth end wrap into the tuners to prevent breakage, think they could separate otherwise.
By Stanley J.
Classicial Thomastik
June 20, 2011
My all time favorite on any of my Guitars.
By Stosh
June 3, 2011
Very good strings. Worth the money. Tone is excellent. I'll be buying them again and I would recommend them to a friend.
By Frank
excellent strings
January 19, 2011
These are excellent strings for playing folk music on an acoustic/electric guitar. I use them on a Martin OMC-1E with great results - the base register is not too heavy with an strong melodic line for finger-style play. And, they are very easy in the finger tips.
By Bart H.
Thomastik-Infeld Classical Guitar Steel/Nickel Flat Wound Light Steel Core, .010 - .038, KF110
July 5, 2010
For a long time I have wished for guitar strings having more brightness and sustain than nylon, but well short of the hard metallic brightness of the spring-tempered steel of standard music wire. My model in thinking about this was softer metal strings, such as the brasses and bronzes used in some other instruments (I mean solid bronze or brass, not steel overwound with something). The trouble with strings of these softer metals is that they don't have nearly the tensile strength of the spring steel wire, and guitar strings need great tensile strength. [Consider that on a guitar you have strings covering a range of two octaves that are all the same length, which inevitably ends up calling for high tensions for the highest-pitched strings. Regardless of string thickness, if you try to tune a bronze string to the guitar's high E at the standard guitar length, it breaks long before you get up to pitch.] So there's a bit of a challenge here in materials engineering. I occasionally fantasized about trying to develop a softer metal string myself, but it would have been quite an undertaking, considering that I have neither the education nor the resources for such a project.
Now I find these Thomastik-Infeld strings which are indeed made of softer steels. They don't sound quite like alternative sound I had in mind, but they seem to reflect a similar thinking. How the Thomastik people addressed the tensile strength question I don't know, but they clearly have been successful in creating a warmer-sounding string of softer metal, suitable for guitar.
I do love the sound of these strings and my appreciation goes to the manufacturer.
Added bonus: because these strings are made of steel, unlike either nylon or brass/bronze, they work with magnetic pickups such as soundhole pickups and other electric-guitar pickups. I like this sound better than quacky piezos.
By bret c.
Thomastik-Infeld kf110
May 18, 2010
These are wonderful strings! I wish they were available more locally. (for less $) But hey, they are well worth it. They sound amazing. You can slide up and down all six strings without that annoying scratch sound that most strings make. They feel really good. I've tried many strings through the years and these are my favorite. Thanks!
By Jay J.
Classic S Strings
November 9, 2009
Without doubt the perfect string to go on my Michael Dunn built guitar. Beautifully balanced both lengthwise and across, full rich tone and correctly intonated at all points on the fretboard. Michael was so impressed he is going to try them out on another style of guitar he builds. I can easily switch from fingerstyle to pick and I don't have to worry about keeping fingernails. I unreservedly would recommend that anyone playing a classic bodied guitar give them a try.
By Richard B.
T-I KF110
November 4, 2009
These are the easiest-to-play flat-wound nickel steel strings I've ever used, and they last! I put a set on my new Taylor 214e in early December 2006 and they are still there, good as new! I play the Taylor every day and perform with it about once a month. Intonation is great, the strings stay in tune, and show no signs of wear. No other strings that I've played over the last 50 years have performed so well as these.






1st E

Plain Steel



2nd B

Stainless Steel Flat Wound on Steel Core



3rd G

Stainless Steel Flat Wound on Steel Core



4th D

Nickel Flat Wound on Steel Core



5th A

Nickel Flat Wound on Steel Core



6th E

Nickel Flat Wound on Steel Core




Classic S Series

characteristics: smooth, brilliant, extra long sustain

"Classic S Series PRECISION are soft steel strings with polished winding specially designed for Folk and Concert guitar. Strings E, A, d, g, b are chrome steel flat wound on a highly flexible steel core, e is made is made of plain steel. Classic S Series ROPE CORE are soft steel strings with extra long sustain. A unique design employing a highly flexible steel rope core brings a high playing comfort. E, A, d are silverplated copper flat wound, g, b, e are Nylon tape wound.



Founded in 1919, one of the world's largest manufacturers of strings for musical instruments has applied 76 years of experience to develop a new generation of strings.


Vienna, music capital of the world


Our strings are handmade by highly qualified specialists. With our extensive quality control via computer and signal processing equipment, we have successfully combined Old World craftsmanship with state of the art technology.


The results of our research and our scientific approach to string manufacturing -- based on cooperation with musicians and scientists -- have led to the creation of a new line of guitar strings that is exactly what professionals are calling for.


Guitar strings for creative musicians.

THOMASTIC-INFELD is the best kept secret in the music industry. Did you know that for decades most of the great jazz and classical guitar players have chosen THOMASTIK-INFELD strings? Old World quality and experience, combined with the most advanced modern technology available, give you creative tools to meet the highest standards of performance. Perhaps the time has come for you to discover what a chosen few have know for years? THOMASTIK-INFELD cares about the needs of professionals and amateurs. Worldwide."



Quick Links
What Sets Us Apart
Help and Advice