The 7" 220 Grit Flexible Diamond Disc is a fine-grit disc designed for final polishing and detailed surface refinement. Engineered with diamond abrasive bonded to a flexible backing, it offers smooth, controlled finishing on hard materials like pool plaster, stone, concrete, and tile. The 220 grit is best used after intermediate stages to remove micro-scratches and achieve a uniform, pre-gloss finish. Compatible with standard 7" polishers and grinders, it performs effectively in both wet and dry conditions, with optimal results when paired with water-fed tools to control heat and dust.