The 0.3945 CHK REAMER ST FL SS HS by Field Tool Supply is a high-speed steel reamer designed for precision finishing of holes. This straight flute reamer is made from stainless steel, providing excellent resistance to wear and corrosion. With a diameter of 0.3945 inches, it is perfect for achieving tight tolerances in various materials. The reamer's design allows for smooth cutting and efficient chip removal, making it ideal for both metalworking and woodworking applications. This tool meets industry standards for quality and performance, ensuring reliable results in every use.