Has anyone ever tried the keitech spin jigs ?

I have some in 3/32 and 5/32. These things at tiny!!!!

What set up do you use in them? Rod. Line. Etc

Also do you have much luck on them?

You mean you have them in 1/16oz and 3/32oz, I haven't seen a 5/32oz spin jig . I don't use theirs as I make my own but I do make what I call my "micro finesse jigs" in 1/16oz, 3/32oz and 1/8oz and they work well, I use the tails from torn up straight tail worms as trailers as well as tiny chunks like the Venom lure Ron Yurko finesse chunks. For rod, reel and line I use a 7' ML-F spinning rod with a 2500 size reel and 6lb or 8lb mono depending where I'm throwing them. Most of the time the water is clear or lightly stained and if I'm fishing boat docks I'll use 8lb line, if I'm on bare backs or rock flats I'll go with 6lb. These jigs get a lot of mixed reviews because the hooks are small and light and what that amounts to is anglers using tackle that is too heavy for that type of fishing, if someone feels they need a larger diameter wire hook, they need to stop trying to finesse fish and just stay with heavy tactics. If you are going to use braid I suggest 10lb or 15lb with a 6lb or 8lb fluorocarbon or mono leader with a medium power rod with a fast or extra fast action with a soft tip or a medium light rod with a fast or extra fast action.