The 0.3955 CHK Reamer by Field Tool Supply is crafted from high-speed steel (HSS) for exceptional performance in precision reaming tasks. This tool features a straight flute design, which allows for efficient chip removal and smooth hole finishes. With a diameter of 0.3955 inches, it is suitable for a variety of materials, including metals and plastics. Made in the USA, this reamer is built to last and meets rigorous industry standards. It is compatible with standard drill presses, making it an essential tool for machinists and metalworkers seeking accuracy and reliability.