Fresh strings, made with quality materials and genuine care just sound and play better. Here's how we do it: • Stringjoy guitar strings are made by a small team in the USA, out of all American materials: top quality nickel and bronze alloys, hand wound around a high carbon steel core wire. • The combination of better materials and more careful craftsmanship creates a more natural-sounding, longer lasting string, without the tone-deadening effects of string coatings. • We're known for our quality control. Our strings are wound in small batches, and we use real human beings at every step of the process: the winding, the coiling, the packing, you name it. • Every string is inspected individually before it goes into your set. If anything is wrong with a string, from the way it's secured around the ball end, through the entire winding, it doesn't make the cut. What does a higher quality set of guitar strings mean for you? ✓ Better tuning stability for the life of the string ✓ Longer string life and less breakage, when cared for properly ✓ Smoother, more balanced playability across the neck of the guitar Our guarantee is what we say it is. If anything does not perform to your satisfaction, return it for a replacement or refund. No hassle, no worries.