Replacing the ceramic cutter of a blade will extend the blade's life, and is less expensive than replacing the entire blade. Made from extra strong ceramic material to resist chipping and breaking. Cutters have a Rockwell Hardness rating of 78 and stay cool during tough clipping jobs. Our replacement cutters come in sizes to fit all Master Grooming Tools Titanium Ceramic Clipper Blades. This is the smaller of two blade parts. Can also be used to upgrade Master Grooming Tools steel blades to ceramic blades. Simply replace the steel cutter of a steel blade with a ceramic cutter.