OSTER Trimmer Replacement BladeOster  Professional blades are produced from the finest high-carbon steel and  handcrafted to our rigorous standards, providing unparalleled precision  and performance. The revolutionary Oster Cryogen-X blades run cooler  during grooming to give you every possible advantage. Freezing the  blades to 300 degree Fahrenheit below zero hardens the fine-grain carbon  steel to a Rockwell hardness rating of 62+, meaning more grooming and  less sharpening, plus an extended blade life.FEATURES:OSTER Trimmer Replacement BladeLeaves Hair Cryogen-X TechnologyFinest High-Carbon SteelProvides Unparalleled Precision & PerformanceUltra-Sharp BladesFITS:OSTER: T-Finisher & Finisher 76059