The 21.5MM Chk Reamer ST FL SS HS is a stainless steel reamer designed for precision finishing of holes. This high-speed steel tool features a straight flute design, allowing for smooth cutting and excellent chip removal. With a diameter of 21.5MM, it is perfect for applications requiring tight tolerances. The reamer is compatible with various materials, including metals and plastics, making it versatile for different projects. Its durable construction ensures long-lasting performance, making it an essential tool for machinists and fabricators.