D'Addario's Phosphor Bronze strings are durable, long lasting, and produce a bright sound. They retain brilliance longer than other bronze and brass alloys.About D'Addario Strings
The devil is always in the details, and sweating the details has been a family tradition at D'Addario for nine generations. Just look at something as simple as their plain steel guitar strings. They pay more to have the ball ends precision turned from solid brass stock. The edges have radii that prevent the ball end from cutting into wooden bridges or guitar tops.
Each string is twisted to perfection right down to the 3 neatly wrapped "lock twists." And those lock twists help keep the plain steel strings from unraveling or breaking prematurely. Each and every spool of precision drawn high carbon steel wire passes 3 quality control tests before it hits the inventory shelves.