The blades fit into a normal razor. For me, the blades should last for about 5 shaves from decent. So a sword the week, by subjecting NEN day. Compared to a system shaver saves an enormous amount of money here. I can not complain about a Blutad. If you pay attention to some extent, then all this is no problem. Sure, here and there it is bleeding before, but worth everything not the speech. Recommended blades.