Seco Niagara Cutter, 17004445, Thread Mill, Series: NTM100, 1/2 in Thread, Internal/External Thread, 0.35 in Diameter Cutting, 0.87 in Length of Cut, 3.5 in Overall Length, 3 Flutes, Cylindrical Shank, 0.375 in Shank Diameter, 2.401 in Shank Length, Solid Carbide, AlCrN