During tube swaging, the tubes are fitted together by increasing or reducing the size of the tube's diameter at the end of the pipe. This shaping is achieved through a repeated hammering motion. The ends of tubes can also be flattened, slotted, notched, flared, flanged, or punched. Rotary swaggers, long die swaggers, and pipe flaring machines are some of the different designs of tube swaging machines. Swaging machines are used on tubes made from a variety of metal materials, including steel, aluminum, brass, copper, titanium, and stainless steel. The tubes made by swaging machines are used in the aerospace, automotive, construction, marine, medical, and military industries.