TITE-FITâ„¢ Electric Guitar Strings utilize a nickel-plated steel wrap wire wound on a round core wire to produce a fatter sound. This classic construction makes TITE-FITâ„¢ a great all-around string that works for a range of styles and genres, including Rock, Blues, Metal and Jazz. The use of the finest core and wrap-wire materials ensure this classic design meets modern performance standards. <> String Length: 38" <> Material: Nickel Plated. Round Core Wire with Ball End. <>