If you're talking about smaller rigs that have multiple hooks along a length, then that's a sabiki rig. You can buy them at many tackle shops.
Their purpose is to catch baitfish, preferably more than one at a time - hence the multiple hooks.
There are different sizes and presentations (ie. glow in the dark, "skin" colored, yarn, plastic, rubber, etc.)
I have been leaning toward Daiichi's. I like the quality better than other brands. But, they're all good enough. It's only for bait fish anyway!