The RIDGID Inner-Outer Reamers have a hardened steel construction and are suitable for cutting copper and stainless steel tubing. They have 46 cutting edges on the interior cone that allow for fast, clean, inner reaming and outer deburring/bevelling of 1⁄4in (6mm) to 2in (50mm). The reamers have dual inch/metric measurement bars. Ref: UTTK5396