Diamond impregnated polishers for platinum and hard metal alloys. Polishers with synthetic rubber bond, grit diamond. Resistant, long service life, effective reduction/polishing. Use for trimming/reduction. smoothing/pre-polishing and high-shine polishing. Material composition platinum, titanium, stainless steel, palladium. Yellow is extra fine grit. Please note, the first four styles pictured from left do not come with the mandrel as pictured.