These blades are intended for the Gillette Fusion razor. They allow a better shave. I usually keep them very very very long time, until it is evident that tear more than they cut. Nothing to say about the product, it is perfect: the razor blades fit perfectly and they are new. Amazon offers packaging in brown box, easier to open than the original packaging, deliberately complicated to deter thieves in retail spaces. The bases integrating with razors are provided. Price is per cons I find shocking. Almost 30 8 blade 4 blade! I always had in mind that razor blades were very expensive because they are excessively stolen in supermarkets. There Amazon has no such worries ... but the price is enormous. Finally it may be the price to pay to be soft! In any case, despite the high price, these blades are excellent and provide a very close shave, even if I'm still far off, wanting to have the perfect shave I press too much ...