Adjustable router jig for square holes or recesses

Hello friends
I made a simple router jig.
It can be adjusted according to what you want to fit.
It is also possible to process non-right angle shapes.

Jig plan convenient for woodworking
https://jisaku-koubou.com/downloads/router-template-jig
[Plan List]
https://jsk-koubou.stores.jp/

You must also watch this video to use this jig.
https://youtu.be/w5TPj_mh7Sc .