For clippers that get a workout all day long, consider Andis CeramicEdge blades. This product designed for use with No.40 and No.40SS blades. High-quality Andis CeramicEdge medium cutter stay sharper longer and require less sharpening than standard steel blade. The low heat transfer and friction index of ceramic keeps blades running 50 percent cooler than steel. You will use less coolant and clip faster with less downtime for increased productivity. Ceramic blades do not heat up, they reduce the risk of friction burns.