Already I was surprised to see that it is the entire system of rotation that is sold and not just the 3 small shaving heads; it explains the rather expensive price (50) knowing that my razor had 300 listen at the time I think. but hey a new system and I had the impression of having a new razor and it was obvious, it cuts better! I pass to places less. by against a downside: the attachment system is plastic, while the original that I had with my razor was metal. I hope that in time this difference will not see.