Carmex Thread Mills Solid Carbide - With Through Coolant - Metric - M8 x 1 - MT7Engineered for precision threading, the Carmex Thread Mills Solid Carbide with Through Coolant delivers clean, accurate M8 x 1 internal threads. Built for production environments using MT7 tooling, it combines robust carbide with bore through cooling to maintain performance in challenging holes. Through Coolant Bore: coolant is delivered directly through the tool bore to the cutting edges, promoting efficient chip evacuation and steady temperature