Replacement Clipper Blade For Professionals By Oster. Oster Professional blades are produced from the finest high-carbon steel and handcrafted to our rigorous standards, providing unparalleled precision and performance. Oster Professional blades are produced from the finest high-carbon steel and handcrafted to our rigorous standards, providing unparalleled precision and performance Furthermore, our U.S. made blades are hardened to RC62-66 (Rockwell Scale C) in-house prior to receiving a cryogenic treatment which further enhances the hardening process The blade cutting surfaces are then sharpened, finished and tested with proven Oster proprietary processes, ensuring ultra-sharp blades that continue to stand the test of time Fits: Classic 76, Octane, Model One, Model 10, Outlaw Clippers Oster Detachable Clipper Blade Size 00000 Great For Complete Shaving of Head Face Finest High-Carbon Steel, Provides Unparalleled Precision Performance Ultra-Sharp Blades, Leaves Hair 1/125" (0.2 mm) Fits OSTER: 76076, 76066, 76077