The 0.3120 CHK REAMER SF SS HS from Field Tool Supply is a precision reaming tool made from high-speed steel, designed for creating smooth, accurate holes in stainless steel and other materials. With a diameter of 0.3120 inches, this reamer is perfect for applications requiring tight tolerances. Its single-flute design allows for efficient chip removal, reducing the risk of clogging during operation. This tool is ideal for machinists and fabricators looking to enhance their drilling processes while ensuring compliance with industry standards.