The Irwin Turbomax HSS Drill Bit is a high-performance drill bit designed for superior drilling in a range of materials. This 5.5mm bit offers exceptional durability and speed, making it ideal for professional and DIY use. It is suitable for portable and cordless drills and primarily designed for drilling metal and sheet metal, but also performs exceedingly well in all types of wood and plastics. It can be used for drilling stainless steel, but a coolant should always be used in that case. Features High-Speed Steel (HSS) construction for long life and durability, designed for efficient and accurate drilling, suitable for various materials, and IRWIN quality and reliability. Specifications Brand: IRWIN MPN: 10502220 EAN: 5709131233244 Size: 5.5mm Overall Length (OL): 93mm Working Length (WL): 48mm.