The 0.4320 CHK Reamer SF SS HS from Field Tool Supply is a high-quality tool designed for precision reaming in various materials. Made from high-speed steel (HSS), this reamer offers exceptional durability and performance. With a diameter of 0.4320 inches, it is perfect for achieving accurate hole sizes and finishes. The reamer is engineered to meet industry standards, ensuring compatibility with a variety of machining applications. Its design promotes efficient chip removal, making it an essential tool for both professional machinists and DIY enthusiasts.