The 0.3905 CHK REAMER ST FL SS HS from Field Tool Supply is a high-performance reamer designed for precision finishing of holes. With a diameter of 0.3905 inches, this straight flute reamer is made from high-speed steel (HSS), ensuring durability and excellent cutting performance. Ideal for use in stainless steel and other tough materials, this reamer provides a smooth finish and accurate sizing. Its design allows for efficient chip removal, making it suitable for both manual and machine operations. This tool meets industry standards for quality and performance, making it a reliable choice for machinists and engineers.