JYG Pro has been testing and using tungsten jigs for a while so we knew it was only a matter of time before they came out with their own. These new tungsten jigs are based on their very effective Semy, which is an awesome all around jig to slow pitch with. The advantage you get with the tungsten model is a faster drop with less scope in deep water, so the larger size 240g TG model will fish more like a larger 400g lead jig making it easier to use and jig with all day long. 

Just like the lead version these feature blue glow instead of the traditional green so they mimic natural bioluminescence much better. These jigs are through wired from the factory but I would still recommend keeping your hooks on top if you're fishing bluefin. For the bluefin I would recommend going with the 200g and 240g sizes when fishing heavier line at night, the smaller 120g size can be very effective as a cast and retrieve jig daytime though. 

These are available in 120g, 180g, 200g and 240g sizes which cover a wide range of depths and fishing styles. They'll cover jigging depths between 50 and 800 feet depending on the line size you're using.