NORTOOLS Drill Bit Sets 25 PCS 1.0-13 x 0.5 mm Titanium Fully Ground DIN338 HSS Drill Bits for Drilling Woodworking Mild SteelUltra Durable TiN Coating Gold colored titanium nitride layer reduces heat buildup by 50% and extends bit lifespan 3X over plain HSS. Precision 118 Split Point Self centering tip eliminates bit walking for faster starts and burr free holes in metal, wood, and plastic. ensuring precise centring during drilling, achieve accurate and clean holes with every use, enhancing your drilling experience. Wider Size Range 25 piece set covers 1. 0mm to 13mm (vs