Are the shafts welded together, or separated so you can slide them on and off a hook eyelet? See link.
I've used them to replace treble hooks because I was hooking myself as much as the fish with trebles! I think they were made by Eagle Claw, and although they had a silver/chrome finish, they rusted pretty quickly. Solved that by coating them with a product called ProtectaClear.
Anyway, they are simply a replacement hook. Some versions are designed specifically for frog rigs as well, can be used with soft plastics, and in large sixes (6/0 and bigger) they are used in offshore fishing.
https://www.eagleclaw.com/274-90-spread-double-hook
Hope this helps
Cheers🐟

He's had umpteen years to figure out exactly what the fish there like, want, and will respond to. It's like you knowing the layout of your home better than an outsider. He may be a localite who has fished in that particular spot a couple times a week since WWII. Some people play golf, some play cards with the boys, but some guys fish and fish a lot.

One trick I've found is simple; ask the old man what he's doing different. If nothing else, he gets his ego stroked and gets to feel like he was superior for a while, and there's a chance you might learn something you didn't know. Yes, he could be a jerk, but that's always the risk.

In a local hole here, I was having dismal efforts, averaging over the course of a year about one fish per 35 hours of fishing. 'Bout ready to hang it up and get a little more exciting hobby, like origami or an extreme sport like watching paint dry. This old guy rolls up and within five minutes is hooked up. In the span of time it'd take me to tie on a different lure, he was fighting the first catch of the day.

So I explained the situation; I had no dad to teach me to fish, I don't know what I'm doing, thinking about ebaying my gear and quitting, a few tips would be much appreciated. From him I learned three individual tips/techniques in the span of twenty minutes that have been universally useful. (I'd share them here but they're so subtle that there's really no easy way to communicate them via text.)

When in doubt, embrace the knowledge he has to offer. Worst case scenario, the guy is a jerk. Best case scenario, you learn something you'd never have found on your own in a circle of futility. At worst, you meet one more old person with an attitude issue.

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by 4AcidRayne