evidence: This is a machine that holds a diamond blade used to cut very hard materials such as tile and glass. These are best to always run with water to keep the dust down and to keep the blade and material cool as it is cut. The finer the grit on the blade, the finer the cut will be. Some blades are so clean they do not boil when you fire polish them. [...] This is a dedicated room where a blower will do cold work that uses water to lubricate as it is cut. Many times you will find a lapping wheel, diamond saw, maybe a drill press with a diamond bit even.