R.Cocco strings are the finest hand-made bass strings available. We use the highest quality materials to ensure balance the tension of each set from the highest string to the lowest string, giving even tone, precise intonation, and reliable tuning. The R.Cocco winding method ensures a long lasting string that retains its brightness. The Fat Pak was designed for players that like a fatter tone from the E and B strings. These strings are great for de-tuning in rock, funk and R&B. The tone is fat and focused.