In industry the selvage may be thicker than the rest of the fabric, and is where the main weft threads are reinforced with a tight weft back binding to prevent fraying. More simply, they "finish" the left and right-hand edges of fabric as it exits the loom, especially for the ubiquitous "criss-cross" "simple" or "tabby" weave, referred to in industry as taffeta weave. Selvages on machine-woven fabric often have little holes along their length, through the thick part, and can also have some fringe. The type or motion of selvage depends on the weaving technique or loom used. A water- or air-jet loom creates a fringed selvage that is the same weight as the rest of the cloth, as by the weft thread is drawn via a jet nozzle, which sends the weft threads through the shed with a pulse of water. The selvage is then created by a heat cutter which trims the thread at both ends close to the edge of the cloth, and then it is beaten into place. Thus it creates a firm selvage with the same thickness as the rest of the cloth.