The Micro-Tec DS4 diamond tipped scriber is intended for scribing lines in glass, ceramics, silicon, metals, etc. Particularly useful for scribing silicon wafers prior to cleaving. Stronger 90° diamond tip on a 3mm shaft for engraving and markings. Longer lasting then tungsten carbide tips when properly used. Pen type scriber with a body diameter of 7.5mm and a total length of 150mm. Sleek knurled coated steel body for excellent grip with a removable clip.