Pack of 10 PCB Cemented Carbide Drills Aiguille Hardware Processing (Tip Diameter: 0.5mm) Material: Imported cemented carbide(tungsten steel, tip), high-speed steel(grip) Application: PCB, SMT, CNC, mold, plastic, copper, stainless steel and other hardware processing Superior material made, strong structure Grip Diameter: 3.175mm Total Length: 37.5mm