Interesting but there are less than a handfull of blades that give me the same number of shaves or more; most blades give me three (or less) decent shaves and these Treets give me, depending on the razor used, 5-6 good shaves. The only blade that does even better is the, also carbon steel, Lord Captain (red).IIRC read these are intended for barbers, hence the short lifespan and following instructions on the wrapper;