Enjoy maximum precision with DualCut technology, which includes 2x more blades. The steel blades lightly brush against one another sharpening themselves as they work. This results in blades that are sharp as day 1 after 3 years of use. Use the metal trimmer with DualCut technology without a comb to get clean, sharp lines around your beard, neck and hairline, or to trim your body hair to a minimum length. Use the precision shaver after trimming, to perfect the edges of your cheeks, chin and neck.