Do these work on Festool tables?

No, these dogs are 3/4" in diameter while the Festool MFT/3 table has 20mm holes. The dimensions are slightly different and would cause play which would affect the accuracy of the dog and/or enlarge the hole. We would recommend using the Parf Dogs which are 20mm and made for the Festool MFT/3 table, link below.https://www.toolnut.com/catalogsearch/result/?q=parf+dogs