Carmex Thread Mills Solid Carbide - With Through Coolant - NPTF - 1 - 2 x 11.5 - MT7Carmex MTB Solid Carbide Thread Mills with Through Coolant deliver precise NPTF internal threads while keeping chip control and tool life at the forefront. Built for demanding production environments, these tools are ideal for shops needing reliable, high precision threading in deep or intricate holes. Through Coolant bore: Coolant is delivered directly through the cutting bore, enhancing chip evacuation and cooling at the point of cut for cleaner