Thanks for the suggestions. Actually they are made of plastic. I use the same lexan material, only a thinner diameter, that I use for the lips. I cut them out and then sink them into a grove in the bait. You actually only see about 1/2 of the piece of plastic. The other portion is anchored into the bait. Once the 10 inches of ice gets off our waters here I'll hopefully be able to post up some pictures.