My dad called them swedish hooks.
Also illegal in Wisconsin and maybe in other states.
There is nothing in the regulations mentioning anything about them??
Where are you coming up with that?
I’ve only used them a couple times myself. The nice thing about them is they’ll hold a dead bait horizonal with the belly down (with a quick-strike rig you often need to pop the air bladder and pull the guts to get them to stay belly down)
That said, I’ve caught pike with belly up dead bait too. When you think about it, it’s the natural position for a dead fish and they’re used to seeing that as well when cruising just under the ice eating dead stuff.