Wrinkle tools are for adding realistic wrinkles to your sculpture by dragging either side across the surface to be textured. WT1 has two sides one with 2 prongs and one with 3 prongs. It is also recommended to sand the tips to your liking. You can lay a piece of plastic wrap over area to be textured and drag tip o tool across surface to be textured for a softer look.
*Both ends of tools shown in image