EFT16 Flat Top strings combine D'Addario's popular light gauging with an exclusive precision polishing process for a smoother, quieter playing surface. Great for recording or slide playing. D'Addario Flat Tops are round wound, then precision ground, leaving the outer surface smooth and "semi-flat." This produces a smooth, flattened playing surface, but does not sacrifice the superb tone and sustain associated with phosphor bronze strings. Flat Tops greatly reduce finger noise and are excellent for recording and flat-picking.