it's useless and not practical and too risky,
you could easily make injury to the audience , it
just a video on how to break a lock pad, he gives an idea on how to perform close up and on stage
and it looks so bad on stage hiding it in the bag , looks very suspicious and not so impressive ,
plus it looks ruined from the beginning, that's why it costs about 5$ , I was so sorry after
purchasing this one , not magical , it's more like a gag between friends.
It is an effective trick as you can do it live , on a stage or in a live chat or zoom beacuse it looks like a self working trick and everything is examinable any time for this reason the trick is called hypno lock as you could imagine sending a powerful thought to their minds .. the most benefit thing is that you can use it as a sudo-hypnosis or try to make people believe what you are going to do!!