One end of the pile wool piece comes up between the two warp threads and the other end comes up on one side of the two warp threads. This is also called the"asymmetrical knot." The asymmetrical knot is used in Iran, India, Turkey, Egypt and China. To form this knot, yarn is wrapped around one warp strand and then passed under the neighboring warp strand and brought back to the surface. With this type of knot a finer weave can be created.