BaBylissPRO SilverFx Collections Trimmer & Foil Shaver DUOBarberology combines the best of both worlds. When combined, the BaBylissPRO FX Silver Outliner Trimmer and Shaver Duo creates a dynamic silver team. With twice the power, you get twice the results. For crisp edges, hard lines, and other fine detail work, the motor in the BaBylissPRO FX Silver Lithium Outliner Trimmer was designed by Ferrari. The graphite T blade with zero gap, deep toothed teeth is incredibly precise. Using hypoallergenic titanium