The pistol grip body has a steel loop for a hook type military sling swivel. The bipod attaches to a sling swivel on the stock fore-end and is easily removable. Trench guns were also fitted with a sling swivel in the stock. An Industrial caster may have either a swivel or rigid caster design. The pump swivel angle covers both positive and negative flow direction. Many return jets are equipped with a swivel nozzle. At the other end are swivel chairs. By use of a swivel seat the policemen could drive the car in either direction. The ladder did not swivel on the carriage. This can be accomplished by adding washers to the swivel joint. Swivel out seats and 8-track were optional. The second is a two-piece design consisting of a radio pouch and a swivel. New was the standard swivel out seats. It can still swivel inside the liner. The "New York Times" described her runway walk as a "ball-bearing swivel of her hips".