BlackSmith ukulele strings are made with the finest materials and manufacturing using state-of-the-art automatic calibration controlled extrusion machine. Monofilament is made from a single fiber of plastic that ensures a long-lasting with increase sustain and purer tone. The extrusion machine produces strings with very consistent diameters and even tension, resulting in stable tuning, accurate intonation, and superior playability. With BlackSmith ukulele strings, you will experience the perfect balance of consistency, tone, durability, and performance. ​