I don’t know what it is. I have at least a 1000$ worth of ice fishing spoons, rattle spoons, jigging raps of all kinds, and I always resort to a 1/16oz northland fire ball jig for walleye fishing. For Perch I either use a small rattle spoon with a 4 to 6″ drop hook and a minnow head, a Swedish pimple with the same drop hook set up, or just a tungsten jig with a minnow head. I did start using the true set hooks on my tip ups and rattle reels and do like them so I guess that is new.