Philips OneBlade 360 ​​razor blade is Philips' latest innovation and is specially adapted to follow the contours of the face In order to get optimal performance from your Philips OneBlade, you should replace the blade every 4 months (based on 2 shaves/week). The change is easy to do - just click off the razor blade and put on a new one. Specifications: - Flexible 360 ​​razor blade for more control and high comfort - 360-degree blade – efficient and comfortable shaving. - The blade is made of stainless steel that lasts up to 4 months of use - Contains 2 razor blades