High-speed steel (HSS) hand reamers from RS PRO are precision cutting tools used for enlarging and smoothing out holes in metal workpieces by removing small amounts of material. These hand reamers are crafted from high-speed steel, a durable and heat-resistant material, ensuring longevity and consistent performance even under demanding conditions. This range of straight spiral flutes with sharp cutting edges facilitates efficient material removal and produces smooth, accurate holes with tight tolerances.