Bolt Buster Heat Induction Tool 

I wonder what you can do with this tool if it's a flange bolt meaning it's located pretty close to the exhaust pipe? I see all of the inserts are straight assuming you have a good access to the bolt like in your video. I wish it came with some angled inserts for those cases where everything is sitting pretty tight...

is it ok to rest the ring on the bolt or do you have to be carful to surround it but not touch it?

Will it work on cap screw bolts?