TC388 Supreme (50–58 RC) and TC389 Supreme (55–65 RC) feature new patent-pending cutting geometries that fully shear off the root of the chip when reversing, thus torque peaks are minimized. This prevents fractures, prolongs the tool life, and increases process reliability. Furthermore, the new taps are coated using Walters new HiPMS coating technology which creates a better surface finish, and higher thread form quality due to this innovative new coating process. Lubrication with oil, which was often necessary until now, is no longer required. Instead, standard water-based emulsions can be used, optimizing handling and saving additional machining costs.