Carmex Thread Mills Mini Type - For Hard Materials - Metric - M3, M4, M5 x 0.5 - MT9Carmex Thread Mills Mini Type are precision solid carbide tools engineered for hard materials, delivering reliable internal threads with excellent surface finish. Built for engineers and machinists who work in challenging alloys, these mills are designed to maintain accuracy and efficiency through the entire cutting process. Thread sizes: Metric M3 x 0. 5, M4 x 0. 5, and M5 x 0. 5, targeting common small to mid size threaded holes. Shank type: MT9,