Brought new life to my Hatteker razor [SEP] I was beginning to think I needed to purchase a brand new razor (even though I purchased the Hatteker cordless razor only 1 year ago).. I was so impressed with the razor when I got it, but the blades obviously dulled over the course of time. It just didn't shave well at all. This replacement head works perfectly and my shaver works like new again.  The head is relatively inexpensive, so I will be replacing again when it becomes dull.  Considering how much I used to spend on old-school stainless steel blades, this is still a bargin.