Engraving multiple pens

We are a pen engraving company and have a very large order to do which will be made easier if I can engrave multiple pens at once. the text will be exactly the same but I dont know how to set this up and also how to make sure it engraves in the same place on each pen. can someone help, please?

This video is for a specific pen, but you can get the idea of how to proceed.

thats very helpful thank you