TTF: Tool design family identifier (Indicates a specialized face grooving and turning tool system that plunges into the face of a component parallel to the spindle axis).
R: Hand orientation (Right-hand cutting direction).
2525: Shank size (A square rectangular tool shank measuring 25 mm wide by 25 mm high, providing excellent rigidity against heavy plunging forces).
-3MM / 3C: Insert pocket size (Precision-machined seat designed to rigidly secure indexable grooving inserts with an exact 3.0 mm nominal cutting width).