Carmex Thread Mills Carbide Mini Type - UN (UNC UNF UNEF UNS) - 1/4 x 28 - MT7The Carmex Thread Mills Carbide Mini Type is a compact, high precision tool designed for UN threads (UNC, UNF, UNEF, UNS) in tight spaces. With a 1 4" size and 28 TPI thread form, this MT7 carbide mini thread mill handles both internal and external threads with exceptional stability, even at higher cutting speeds. Tool material: Carbide MT7 sub micron grade with TiAlN multi layer coating for durability and heat resistance Coating system: Titanium