excellent in my DB Edwards razor
First time using a razor with blades like this
I bought the assorted pack of 5 razors and tried them all. I found that the Shark blades gave me the cleanest, closest shave w/o causing skin irritation. Some blades in the pack were too rough for my face. Others didn't give me a close enough shave. This brand was in the middle- just right.
Great I like the balance and the shave is close and clean for a long time. Blades stay sharp enough to reliably reuse it a few times before disposal.
Bought Shark and Feather. Have only used Shark so far. They are sharp and give a smooth shave.