What is the padlock attachment for a Masterpact NW?

Please refer the following product references from the NW catalogue. Please see the attached pages of the NW catalogue.

For more details please refer:
https://download.schneider-electric.com/files?p_enDocType=Catalog&p_File_Name=LVPED208008EN.pdf&p_Doc_Ref=LVPED208008EN

Released for:Schneider Electric USA