Ultramicrotome diamond tools are used to slice very thin sections from a material specimen such as biological tissue to provide a thin specimen for study under a scanning or transmission electron microscope. These tools are also used in the materials science art to cut plastics, metals, or the like.
Diamond knife means a blade attached to an ultra microtome for slicing biological specimens and macro molecule materials. Its hardness is higher than the glass knife; thus, it can also be used for cutting hard industrial materials.