ITEM NAME:10X 0.8-3.175mm Coated Carbide Cutter Engraving CNC Router Bits End Mill for PCB Descriptio n Description: Car.Range of processing: PCB, SMT, the CNC, mold, plastic. Coated with titanium:Improve the speed and feed rate of the tool ,Improve the surface wear resistance. We'd like to settle any problem in a friendly manner.