The 0.4185 CHK Reamer by Field Tool Supply is engineered for precision reaming in stainless steel. This high-speed steel (HSS) tool features a straight flute design that enhances chip removal and provides a smooth finish. With a diameter of 0.4185 inches, it is perfect for precision hole creation in various materials. The stainless steel construction ensures durability and resistance to wear, making it suitable for both industrial and home use. This reamer complies with industry standards, ensuring reliability and efficiency in your projects.