Shank Diameter:1/4 in All returns accepted:ReturnsNotAccepted Country/Region of Manufacture:United States Cutting/Head Diameter:3-1/4 in Condition:High Quality USA Made Involute Gear Cutter very good condition see photos. Browne & Sharpe #3 4P 35T - 54T D+F 539-20PA Involute Gear Cutter Dia. 3-1/4" MPN:Does Not Apply Brand:Browne & Sharpe Material:High Speed Steel Mill Cutter Type:Inovolute Cutter