I was a magnetic induction thermal heat specialist for years and I can attest to how well induction works. First of, he probably didn't even need to heat it that long for it to work. However heating it too much is counter intuitive since the heat will eventually travel into the bolt itself and cause it to expand in the nut making it harder to break free. They make other sets of these with more attachments and some come with a long rope type for muffler installs. If you're a mechanic this is really a nice tool to consider. You may not need it often but I'm willing to bet that when you do you will be happy you have it.

Your video went out with a bang👍 good job

Weird. Pretty cool though. Thanks for the review.

Never ever take the heating element off if its still plugged into electric, it destroys them!!

Induction coils only work on ferromagnetic steel. All it does on other metals like stainless steel and aluminum is overheat and destroy the device, as no current is absorbed. That device also has a duty cycle, which to pushed right up to. Imagine turning off the spotlight to show the orange glow of the bolt?

It was like 2 minutes but you didn't need a tourch and have to keep gas in them