I've got alot of different snips. As I recall a company called Klenk were the inventors of the modern day hand-held tool we call snips. I've seen them, but never used or owned any. They look bulky and crude, but that could mean they're strong.
Some call them aviation snips (their first wide usage was for airplanes apparently), others metal snips or tin snips. As the older generation sheet metal workers were known as "tin knockers", I'm used to calling them tin snips.
Here's some Malco's.