The UNASIS U-Roller Swaging Tool, Crowned Roller Swaging Tool, or Flat Roller Swaging Tool with Crowned Rollers are utilised with a chamfered bearing and housing. To place the material onto the bearing and housing, a sacrificial sleeve is used. The tool is commonly used on the Boeing BAC5435, another method is the Flat Roller Swaging Tool. In addition, the U-Roller Swaging Tool is a common method used on the Airbus Specification 01-05-10.