ISO 12197:2016 specifies the dimensions of milling cutters intended for manufacturing woodruff keyseats in accordance with ISO 3912.

Two types of woodruff keyseat cutters with cylindrical shank are specified:

- woodruff keyseat cutters with cylindrical shank, in accordance with ISO 3338‑1;

- woodruff keyseat cutters with flatted cylindrical shank, in accordance with ISO 3338‑2.