Carmex Internal Multiple Threading Insert holder - For Carbide External/Internal Threading Inserts - SR0100E40-6The Carmex SR0100E40 6 Internal Multiple Threading Insert Holder is a purpose built solution for CNC milling that uses replaceable carbide inserts to form internal threads with precision and efficiency. Designed for shops aiming to speed up internal threading jobs, it leverages a multi insert configuration to maximize productivity. Multi insert configuration: Holds 48 inserts in a single holder, enabling more cutting time per setup. Internal threading