The irwin 15 piece hss titanium metal drill bit set is a professional-grade drill bit collection designed for drilling metal and harder alloys with enhanced performance and durability. Engineered with a titanium nitride coating, these hss pro drill bits deliver superior friction resistance and extended bit life compared to standard alternatives. The coating enables drilling speeds that are 40-60% faster than conventional bits, making them ideal for tradespeople working on fabrication projects, metalworking tasks, and engineering applications where efficiency matters. Each bit features a 135 split point that ensures perfect centring and minimises bit walk, reducing the drilling pressure required whilst delivering cleaner, more accurate holes. The heavy-duty web construction provides optimum strength and durability, making this set suitable for demanding workshop environments and regular professional use. Features and benefits: titanium nitride coating for longer bit life and higher friction resistance 40-60% faster drilling speeds compared to standard drill bits 135 split point minimises bit walk and ensures accurate positioning heavy-duty web construction for enhanced strength and durability comprehensive 15-piece set covering commonly used sizes from 1.5Mm to 10mm specifications: type: hss no. Pieces: 15 this 15 piece set contains the following sizes: 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 8, 9, 10Mm.