NYXL’S FEATURE D’ADDARIO’S EXCLUSIVE NEW YORK MANUFACTURED, HIGH CARBON STEEL ALLOY FOR UNPRECEDENTED STRENGTH – PLAY FEARLESSLY. IMPROVED TUNING STABILITY COMPARED TO TRADITIONAL NICKEL WOUND STRINGS - GET IN TUNE FASTER, STAY IN TUNE BETTER. IMPROVED TUNING STABILITY COMPARED TO TRADITIONAL NICKEL WOUND STRINGS - GET IN TUNE FASTER, STAY IN TUNE BETTER. WOUND STRINGS WITH ENHANCED MID-RANGE FREQUENCY RESPONSE IN THE 1 - 3.5 KHZ RANGE – MORE PRESENCE AND CRUNCH TO CUT THROUGH THE MIX. NYXL1156 OPTIMALLY DESIGNED FOR TUNING GUITARS DOWN A WHOLE STEP TO D OR FOR PLAYERS WHO PREFER A HEAVIER STRING SETUP: PLAIN STEEL .011, .014, .019, NICKEL WOUND .032, .044, .056. ENVIRONMENTALLY FRIENDLY, CORROSION RESISTANT PACKAGING FOR STRINGS THAT ARE ALWAYS FRESH.