The O.M.F. (Optical Magnified Facet) unit is the latest state of the art in gem cutting. It heralds a new era in faceting by creating new and unique optical and geometric effects. It will provide unlimited possibilities for new designs which were previously impossible. The O.M.F. unit is sure to test and expand the skills of experienced cutters as well as to kindle new levels of creativity in the art of gem cutting. While this unit is not generally for the beginning novice, it can be mastered by almost anyone. O.M.F. unit comes as pictured above with 3/4″ open end wrench, 3/8″ collet and one set of mandrels consisting of 1 PolyPro 1200 plated and 2 BATT in the 17 mm size.