Miss the Pontiacs
Well-known member
Probably not what you were thinking. This is a tool/jig call it what you will. I had never heard of this before today it likely has been around for 100s of years. 
I saw that video last night. I've watched a lot of her videos and really like them. Rather than focus on what the latest tool can do she is showing how to be clever about using basic tools. I'm not a pro and home construction isn't my area so many of these simple tricks are new to me. This is yet another obvious once you see it sort of trick.