A heddle is an integral part of a loom. Each thread in the warp passes through a heddle which is used to separate the warp threads for the passage of the weft. The typical heddle is made of cord or wire and is suspended on a shaft of a loom. Each heddle has an eye in the center where the warp is threaded through. As there is one heddle for each thread of the warp, there can be near a thousand heddles used for fine or wide warps. A handwoven tea-towel will generally have between 300 and 400 warp threads, and thus use that many heddles. In weaving, the warp threads are moved up or down by the shaft. This is achieved because each thread of the warp goes through a heddle on a shaft. When the shaft is raised the heddles are too, and thus the warp threads threaded through the heddles are raised. Heddles can be either equally or unequally distributed on the shafts, depending on the pattern to be woven. In a plain weave or twill, for example, the heddles are equally distributed. The warp is threaded through heddles on different shafts in order to obtain different weave structures

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