The ShapeGuard Composite Trial Pack contains 2pcs spiral head diamond polishers with RA-shanks for smoothing and prepolishing (color purple) and 2pcs for high luster polishing (color cyan) of composites. High abrasion of the prepolisher, thus recommended for composite materials with higher final hardness. Recommended speed range for all polishers included: 10‘000 – 12‘000 rpm. Exert minimal, constant pressure. Use only wet. Head diameters 11mm and 14mm, head lengths 1.6mm.