A beater or batten, is a weaving tool designed to push the weft yarn securely into place. In small hand weaving such as Inkle weavingand tablet weaving the beater may be combined with the shuttle into a single tool. In rigid heddle looms the beater is combined with the heddles. Beaters appear both in a hand-held form, and as an integral part of a loom.
Hand beaters must have enough mass to force the weaving into place, so they come in a variety of weights and sizes. Some may have lead inserts to provide additional heft for a smaller beater, and some are made entirely from metal.
Loom beaters typically take the form of a bar mounted across the loom. The actual beating is done by a metal insert known as a reed, which contains a number of slots, known as dents, which the warp threads pass through. This is the more common form, as floor looms and mechanized looms both use a beater with a reed.