1Size 272 Series Chucking Reamer, 2-1/2 IN Length, Solid Carbide, Decimal Equivalent: 0.1305 IN, 0.127 IN Shank, 3/4 IN Flute Length, Number Of Flutes: 4, Straight Flute, Straight Shank, For Steels, Stainless Steels, Cast Iron, Special Alloys, Hardened Steels (35-65Rc), Non-Ferrous