Carmex Carbide Shank Toolholder With Internal Coolant For CMT Inserts - CRC1010L45MCarmexs Carbide Shank Toolholder with Internal Coolant for CMT Inserts (CRC1010L45M) is a precision ready holder engineered for vertical milling and internal thread work. Built for reliability in high parameter machining, its ideal for shops that demand repeatable performance with minimal setup. Model and compatibility: CRC1010L45M designed for C10 inserts; accepts RH LH threading with a 10. 0 mm carbide shank and a compact neck diameter of 7. 3 mm.