Professional Quality, 4″ (100mm) Vitrified Polishing Pads Deliver Fast and Efficient Removal of Saw & Grinding Marks on Granite and Harder Marble – an Effective Pre-Polish Pad Efficiently Shapes and Hones Natural Stone.  Highest Quality Diamond Crystals Ensure Best Finish.  Vitrified Pads are Bonded with Compressed Diamond Pellets Encased in Highly Engineered Plastic for Maximum Longevity & Performance.