Field Tool Supply's 0.3910 CHK Reamer is a premium tool designed for precision reaming in stainless steel. Constructed from high-speed steel (HS), this reamer features a straight flute design that enhances chip removal and provides a clean finish. With a diameter of 0.3910 inches, it is perfect for applications that require accuracy and reliability. This tool is built to endure heavy use, making it suitable for both industrial and home projects. It adheres to industry standards, ensuring consistent performance across various tasks.