Carmex Single Long Carbide Shank Threading Insert holders - For Carbide External/Internal Threading Inserts - SR0027S30CMeet the Carmex SR0027S30Ca single long carbide shank threading insert holder designed for CNC milling where extended reach is required for precise external and internal threading. Internal coolant bore: Through tool coolant path delivers coolant directly to the insert, enhancing chip control and extending insert life. Long overhang optimization: Specifically engineered for applications that demand a long reach, providing stable performance on deep or