Philips Shaver Series 1000, Electric ShaverDescription 27 self sharpening blades stay sharp and prevent irritation Keeps rotating against the cap to guarantee the blades stay sharp and prevent from irritating your skin. Protective cap avoids getting irritation and nick and cuts Protective cap that comes between the rotative blades and your face to avoid getting irritation and nick and cuts. Floating shaving heads adjust to your face and neck curves The shaver heads float in different