With the Philips OneBlade QP240/50 pack of 4 you get enough blades to shave for around a year. For a hygienic shave you have to change the blades after four months. The OneBlade razor blades will shave you with a system where a knife with 200 shaving moves per minute cuts off hair. This high speed makes the blade suitable for short and long beard growth. Moreover, the blades have a smooth coating and rounded ends. This protects the skin and prevents skin irritation. To keep the blades clean, rinse them under the tap after each shave.This text is machine translated.