Making a sandblast nozzle from an old spark plug

[The Cobbler]

I recently came across this guy on you tube & have been watching his videos .
He has made a sandblast nozzle from an old spark plug & claims it to be awesome.
I have no affiliation to this guy , just passing the info along in hopes someone finds value in it
He also made a deadman valve from scratch

 

[driftpin]

That's an interesting way to make a sandblast nozzle. I believe in other posts on here, people have mentioned using a ball valve rated for blasting use, to get the wear reduced, and for a longer life-cycle.

Isn't a 'deadman switch/valve' one which automatically turns-off when the operator's grip on it is released?

 

[The Cobbler]

Isn't a 'deadman switch/valve' one which automatically turns-off when the operator's grip on it is released?

I think so . but his does I think?