DescriptionSpecificationsDescriptionHelical Flute Thread Mill: 1/4-28, Internal, 3 Flute, 1/4" Shank Dia, Solid Carbide 28 TPI, 0.18" Cut Dia, 1/2" LOC, 2.5" OAL, AlTiN+ CoatedSpecificationsManufacturer NameScientific Cutting Tools