Carmex Thread Mills Carbide Mini Type - UN (UNC UNF UNEF UNS) - 1/4 x 20 - MT7 - 19mm ReachThe Carmex Thread Mills Carbide Mini Type is a compact, high precision threading tool designed for both internal and external threads in tight spaces. With a 1 4 x 20 UNC thread capability, MT7 shank, and a 19 mm reach, its built for versatile, fast threading in challenging workpieces. Thread types supported: Internal and external threads in UNC UNF UNEF UNS formats, specifically 1 4 20 size. Shank and reach: MT7 shank for strong, accurate mounting;