Wringing
Wringing involves sliding two ceramic gage blocks or steel gage blocks together to make them adhere to one another in the process of measurement. Wringing occurs because of molecular attraction between the gage blocks resulting from air pressure and surface tension. In order to wring together two ceramic gage blocks or steel gage blocks you simply slightly oil the surface of the gage block, slide it perpendicularly across a second gage block while applying pressure, and rotate the gage block while applying further pressure until it is aligned in a parallel manner with the second gage block.