The Classic, Tried and True The Dean Markley Nickel Steel Signature Strings are used and loved by thousands of professionals worldwide. They are proven and have a long-lasting tone. With nickel-plated steel that is slowly wound by hand via a hex core, the outer string wrap keeps 100% contact with the core. The result? A string that fully vibrates for maximum sustain and produces a warm, full, distinctive classic rock and roll sound. Playing these strings will feel at home!