Carmex Carbide Thread Mills - ISO 3XD Mini Type - M4 x 0.7mm (58mm length)Compact, high precision carbide thread mills built for deep hole threading in tight work envelopes. Designed for professionals who demand reliable internal and external threads, this 58 mm ISO 3XD Mini Type tool delivers consistent results in challenging geometries. Thread size & length: M4 x 0. 7 mm thread form, ISO 3XD mini type, with a 58 mm overall length optimized for deep hole work Carbide grade & coating: MT7 Sub Micron carbide with a titanium