Engineered for precision and efficiency, this multi-step reamer from Drillco Cutting Tools features a high-speed steel construction with a black oxide finish, ensuring durability and reducing wear during use. Designed with spiral flutes for enhanced chip removal, it accommodates fractional sizes ranging from 5/16 inch to 9/16 inch, making it versatile for a variety of applications. The 3/8 inch shank allows for secure attachment to drills, while the 3-flat shank design provides added stability, making this tool an excellent choice for both professional machinists and DIY enthusiasts looking to achieve clean, accurate holes.