Feather Professional Super blades will fit any of the Feather Artist Club Razors. Designed for those with a heavy or coarse beard, Feather Professional Super blades are a little thicker (0.310mm), wider and more aggressive to meet the demands of a tougher beard. Manufactured to the highest standards and designed for professional use, you can expect them to provide the closest and smoothest shave possible. Blades are packed in their own injector-style dispenser for fast, easy, and safe blade installation and convenient storage. Made in Japan.