DR the hand wound string. The strings are wound at a much slower rate. When strings are made, the metal is bent as it wraps around the core. Bending metal causes it to heat, especially when it is done very fast. Winding the strings slower reduces this heat which in turn reduces the expansion in the winding. This creats a much tighter wind. To you the player this mean much better sustain and tone. This is truly a premium grade string for those looking for the ultimate tone out of thier guitar.
