they work but [SEP] i can not put my finger on what is going on any other razors and foil i have used with this razor have worked fine these sound like they are hitting the foil and rubbing on it i added a few drops of mineral oil to see if that would help it did not they do cut my whiskers but not as close as they should not worth sending back i will just buy from a different company the next time i need replacementi guess buy at your own risk