The Trick-or-Treat from Kelly is a greatly modified wooly bugger.....some fluffies and some rubber legs. It works great anwhere a bugger does for trout, smallmouth, largemouth etc.......but also makes a great little sculpin pattern as well as a crayfish pattern. We have used this to imitate crayfish and had some success on carp as well. Has a conehead so it will ride hook up which is critical for crayfish imitations and for carp fishing. Size 4.