Carmex Thread Mills Solid Carbide - Internal Thread - Metric - M18, M20 x 2.5 - MT7Carmex MT thread mills in solid carbide deliver efficient internal threading in metric sizes for shops that need reliable, costeffective thread production. Built for MT7 applications, this tool is ideal when you want robust performance on M18 and M20 x 2. 5 threads without the complexity of tapping. Material: Solid carbide for high rigidity, wear resistance, and longer tool life in demanding materials. Operation: Internal thread milling that creates