135° tip with cross-cut for perfect centering and reduced drilling pressure. Industrial spiral groove for high-precision drilling and fast chip removal. Body made of high-quality steel with titanium nitride coating (TiN). Heat and friction resistant, with a lifespan up to 6 times longer than conventional metal drills. The TiN coating has a hardness of about 80 HRC and is highly wear-resistant. TiN has a low coefficient of friction, meaning less force is required and less heat is generated during drilling. Compared to traditional HSS step drills, the speed can be increased by 40-60% and the feed rate by 10-20% without significantly reducing the drill's lifespan. Titanium nitride is a poor conductor of heat, so the heat generated during drilling is dissipated into the chips and coolant rather than into the drill. Up to 6 times longer lifespan than ground alloyed steel.