Double-head electric shavers have always had a very good shaving effect, but they are more difficult to shave off fine stubble or the curved angle of the chin. In order to solve this problem, the new product adds a "third blade" design, that is, a third blade is added between the two blades. When the double blades sink into the skin, the third blade will not scrape the skin. Shave off the stubble thoroughly. At the same time, the "third knife" is ergonomically designed and can completely remove beard from the dead corners of the chin.