Carmex Thread Turning Holder Standard - Internal - Left Hand - 170mm OAL - 16IL Insert - 20 Shank Size FHH while the optimized geometry supports

while the optimized geometry supports clean finishes across roughing and finishing operations

quick‑change tool retention that fits standard BT50 spindles

this reamer maintains a tight diameter to ISO H5 tolerance

dimensionally stable holes to support reliable assembly and performance in engineering projects

helping you identify non-conforming parts at a glance without confusion

Carmex Thread Turning Holder Standard - Internal - Left Hand - 170mm OAL - 16IL Insert - 20 Shank Size FHH while the optimized geometry supportsThe Carmex Thread Turning Holder Standard is a precision internal threading solution designed for shops that need reliable lefthand threading reach. Built to deliver secure toolholding and consistent thread quality, its a practical choice for machinists working with tight tolerances and deep cavities. Left hand internal threading holder: Specifically configured for lefthand internal threads to ensure correct chirality and cutting dynamics. 170 mm