DR Strings Electric Guitar Strings, Black Beauties - Extra-Life Black Coated, 10-52 Gauges 10-13-17-32-42-52 The latest in coated technology for increased tonal life Black precoated wire for fast and smooth fingering Advanced coating for EXTRA-Life and Protection DRs EXTRA-Life Black Beauties offer guitar players a superior black coated string without sacrificing the crisp tone, clarity, and volume of traditional DR HandMade Strings