Carmex Thread Mills Solid Carbide - With Through Coolant - MJ - MJ 8 x 1.25 - MT7The Carmex Thread Mills Solid Carbide with Through Coolant (MJ 8 x 1. 25, MT7) is a high precision threading tool designed for demanding internal thread milling tasks. Built for professional workshops and precision shops, it brings reliable carbide performance together with a revolutionary through coolant bore for cleaner, cooler, and longer lasting threading operations. Through Coolant Bore: coolant is delivered through the tool bore to the cutting