Carmex Internal Multiple Threading Insert holder - For Carbide External/Internal Threading Inserts - SR0100D30-4The Carmex Internal Multi Threading Insert Holder (SR0100D30 4) is a dedicated internal threading tool for CNC milling that enables reliable, high productivity thread milling with replaceable carbide inserts. Model and purpose: Carmex Internal Multiple Threading Insert Holder (SR0100D30 4) designed for internal threading tasks on milling machines Insert capacity: Supports 48 inserts per holder to cover diverse thread profiles without changing tools