Pyramid Nickel Classics are the right choice if you are looking for guitar sounds from the 1950s and 1960s. Modern strings are made with hexagonal core wire (simplifying production and manufacturing costs), Pyramid Nickel Classics are made with round core wire, like the strings were made in the 1950s and 1960s.
The Nickel Classics have a significantly improved vibration response, resulting in a very long sustain and consistent tone development. Nickel Classics are made of 99.2% pure nickel.
ATTENTION! The wound strings cannot be simply cut because the nickel round wound would unravel immediately. First twist the string sharply and then cut the string behind the bend.