Andis Black UltraEdge cat blades are specifically designed for feline grooming with a tooth configuration that creates a unique wave pattern and feeds hair better than market alternatives. These cat blades feature Electro Glide Technology. EGT will smooth out natural imperfections that are often found on metals. The smoother metal finish accounts for less resistance while grooming, feeding hair through the blade for a faster cut. EGT will also reduce corrosion giving a longer blade life.