... And the reason is quite simple ... Hello, ... The Blades may namely also on the ordinary Quattro razor blades ... and these here are simply sau-well, I use it already for approximately 1 year. The blades can be raushebeln with little force / Rotate and since each blade has its own blade protection is the risk of injury to zero. One can see very clearly in the pack that blades can be produced much cheaper and with spare blades actually much money is earned. Too bad about the many plastic waste when so proceeding as I have done already with about 10 square ... and blades are still massive left holding namely good 3-4 weeks (about 20 +/- shaves). Greeting, Rounder6