Not certain but I think I posted this a couple years ago....

This was done on a 1/16 underspin with a treble in lieu of the blade and rigged with a plastic. Vertically jigged this guy was a monster on crappies right at the transition to ice. Friends added a waxie to the treble, but I fished it as you see it. I still carry a few of these with me and use them occasionally. If the crappies are on, these work great and fall-offs are a thing of the past. These are way cheaper than the Jigging Raps too.
I modded the cast on barb and collar off but added the #400 keeper wire in.