The Starrett HSS Pilot Drill (79mm) is a standard high-speed steel drill designed for use with bi-metal hole saws. It provides precision and durability, ensuring smooth and accurate drilling. This pilot drill is compatible with all Starrett arbors starting with the letter "A," with the exception of the A3 Ulti-Mate and A6 Kwik-Change models. Ideal for professionals requiring reliable performance and long tool life when working with hole saws. Steel body material