After months of daily shaving, the ultra-thin and ultra-smooth blade of the razor can wear too thin, resulting in a lack of flexibility, less efficient performance and a less than optimal shaving experience. To maintain the level of grooming comfort and satisfaction you require from your razor. Genuine Panasonic ultra-thin, ultra-smooth and flexible blades are forged from premium stainless steel and are designed, tested and certified to ensure a superior standard of excellence. Panasonic replacement blades are designed and assembled to fit your specific razor model and they are installed in seconds. Just remove the worn blade and snap the new ones into place. Panasonic & Apos' precision-made replacement blades are made with the same allergy-friendly finish to prevent skin irritation and maximize comfort. Panasonic blades for ES-173/6/7/9/206/2211/2235 Shaver Models.