The 0.3935 CHK REAMER ST FL SS HS from Field Tool Supply is a high-speed steel reamer designed for precision finishing of holes. With a diameter of 0.3935 inches, this reamer is perfect for achieving smooth, accurate holes in various materials. Its straight flute design allows for efficient chip removal, making it ideal for both manual and machine operations. Constructed from stainless steel, it offers excellent corrosion resistance and durability. This reamer is suitable for use in automotive, aerospace, and general machining applications, ensuring high-quality results every time.