We R Memory Keepers Envelope Punch Board

Package includes score board, 2-way envelope punch, bone folder and measurement chart. The 2-way punch creates fold tabs and rounds corners. There is an envelope sizing chart printed on the front of the board and the score guide eliminates the need for repeated measuring.

https://www.youtube.com/watch?v=pDxZnY8ACNk

https://www.youtube.com/watch?v=jZ-oge5M9MA