Irwin/Hanson's 62128 aircraft fractional drill bit delivers precision drilling performance for demanding applications. Engineered from high-speed steel (HSS), this 7/16" bit excels in metalworking, aerospace projects, and general fabrication tasks where accuracy matters. The fractional sizing ensures compatibility with standard drill chucks and fixtures. Built to withstand high-speed operations without compromising edge retention, this professional-grade bit handles both ferrous and non-ferrous materials effectively. Ideal for machinists, technicians, and serious DIY enthusiasts who require reliable, repeatable results. Comes carded for convenient storage and identification.