Education and Communications What is dot peen marking? What is dot peen marking? Dot Peen marking or engraving is a pin marking application that allows manufacturers to make deep, permanent impressions in a variety of materials for identification and traceability. Related Posts:How to block channels on smart TVs with step-by- step instructions.How to wire a 2 Pin Plug is a video on how to connect a plug.How do you remove laser marking?Is engraving available in Apple Store?