These are men's razor blades that come in a pack of 10 pieces. The material they are made of allows for a smooth and perfect shave. It is also a material that has no static charge, so it allows the blades to glide across the skin without any problem. It is a product that, although it comes properly packaged, should always be out of reach of children. This type of blades have a compact and hygienic design, as well as being sharp enough to last for several uses. Kai Kasho blades can be used normally by people who know how to handle a sharp object responsibly. A blade from this package can be used until it loses its sharpness. Suitable for men of all ages.