The name says it all! These blades are noted for being "SHARP" as well as extremely smooth and comfortable to shave with. They are polymer coated for a smooth shave and blade durability. These blades are made of Swedish steel that may be one of the sharpest blades manufactured today. In addition to be extremely sharp, these blades provide an unbelievable comfortable shave as well. This fine blade is a must for the wet shaving enthusiast! It fits all standard double edge razors.