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Replace the blades on your Oster Clipmaster with this set. Set includes one top blade(83 AU) and one bottom blade(84 AU), both crafted from heat-treated carbon steel. Cryogen-X™ technology process leaves these blades harder, sharper, and offers greater wear resistance than most blades on the market. Hand lapped for a smooth cut finish, blade leaves hairs 1.8 mm long.