Philips OneBlade Replacement Razor Blade Heads × 4, QP440/8 Choose Philips OneBlade, from the Number 1 Preferred electric Grooming Brand. The innovative 360 Blade can flex in all directions to adjust to the curves of your face and enables constant skin contact and control. Its dual protection system - a glide coating combined with rounded tips - makes shaving easier and more comfortable. This blade fits on all OneBlade handles. Each OneBlade stainless-steel blade lasts up to 4 months of use. To keep that fresh feel, replace your blade when you see the eject symbol appear. Includes: 4 x OneBlade 360 Blade. Durable stainless-steel blades for longlasting sharpness up to 4 months.