HSS TITANIUM DRILLS - DIN 338 TITANIUM NITRIDE COATING The drill body is made of high-quality high-speed steel coated with a layer of titanium nitride (TiN). The TiN coating has a hardness of approximately 80 HRC and is very resistant to wear. The TiN coating has a low coefficient of friction. This allows for lower energy consumption and ensures less heat generation during drilling. EAN: 5709131283515