[1] https://www.amazon.co.jp/dp/B00CB700UK/
These ones look very nice though.
I have several and in my engineering and drafting education were referred to as drafting pencils. They have that cool whirly sharpener too.
One of fmy favorite holdovers from the old world is that you can still buy them, along with a few other basic hand drafting tools from office supply stores like office depot. Stadler is one of the big brands.
If you compare inheritance machining to e.g. this old tony, the later has years of growth with the videos getting better of the years as he refines his formula. In comparison inheritance machining just popped up with perfect content, script and video editing.
There are other examples of channels that just popped up that start at a very high quality level that I suspect some third party involved in that process.
Compare this to someone ten years ago who was trying to do this with Super-VHS etc, with software that was very expensive, and forget about doing anything multi-camera. So the tools are just far more accessible.
Then combine that with a creator who has seen what works and doesn't work on YT/Insta. You need a good thumbnail, you need less talking heads etc etc.
And I think that Brandon at Inheritance Machining is very detail oriented, as you would expect from someone doing machining. This probably translates well into producing a quality video.
> The mechanical pencil became successful in Japan with some improvements in 1915 by Tokuji Hayakawa, a metalworker who had just finished his apprenticeship. It was introduced as the "Ever-Ready Sharp Pencil". Success was not immediate since the metal shaft—essential for the pencil's long life—was unfamiliar to users. The Ever-Ready Sharp began selling in huge numbers after a company from Tokyo and Osaka made large orders. Later, Tokuji Hayakawa's company got its name from that pencil: Sharp.