The #21 Drill Blank HS (High-Speed) from Field Tool Supply is designed for precision drilling applications. Made from high-speed steel, this drill blank offers exceptional durability and heat resistance, making it ideal for various materials. With a diameter of 0.1590 inches, it is perfect for creating accurate holes in metal and wood. The drill blank is manufactured in the USA, ensuring high-quality standards and compliance with industry specifications. This tool is essential for machinists and DIY enthusiasts looking for reliable performance in their drilling tasks.