these work with the original razor heads from the dsc [SEP] i used to subscribe to the dollar shave club but got tired of being gouged for razors so i canceled my subscription by this time i had quite a cache of razors so i did not worry about needing more any time soon what i did not count on was that i would drop and break the handle i tried ordering a new dsc handle on amazon only to learn that the dsc had moved to a different razor handle and blade so the new handle would not work with my original blades ughi found this one and decided to take a chance yes they work so feel confident that if you are in the same boat as i was you have found one that works