The workman is seen with a portable precision drill guide / weighted drill mount that makes his electric drill into a “mini drill press.”
I like that setup and I’ve search the web for it, but I’m coming up empty. I’m curious if anyone knows the specific name for it, or where this drill guide can be purchased?
Knowing JSK, he probably made it himself. If he did I can’t see a guide to making it on his channel.
Otherwise it might be only something you can buy in japan.
The usual ones you see are something like this. DrillMate™
Hope that helps.
FWIW, I think I may have seen this same tool one other time, and it may have been (seems like it was) a different YouTuber. If so, it seems he did not create it himself.