Carmex Extension With Internal Coolant Bor - for Indexable Milling Holders - E25M12L150Carmex Extension With Internal Coolant Bore for Indexable Milling Holders (E25M12L150) is a highefficiency threading extension designed for CNC milling machines. Built for mill threading with helix interpolation, it lets you create precise threads with a single setup and minimal tooling changes. Designed for E25M12L150 indexable milling holders: Precisionfit extension optimized for seamless compatibility with Carmex MT tools in standard milling