which fire extinguisher?

Bodyperson said
A hard hitting air chisle will not need the + sign. Shear them bitches right off.

Most of the ones I was cutting out were 5/8" rivets in 3500 Chevy trucks when I worked at the local Chevy dealer years ago. My new at the time Snap On air chisel would do it, but it was so much faster cutting the head as I described.