3M 4-Inch Black Diamond Polishing Disc

3M 4-Inch Black Diamond Polishing Disc: Redefine Polishing Excellence for Tough & Delicate Surfaces Alike​At the heart of this disc lies 3M’s specially formulated black diamond abrasive grains—selected for their exceptional hardness, sharpness, and resistance to breakdown. Unlike standard polishing discs that dull after a few uses, 3M’s diamond grains retain their cutting power even when polishing dense, hard surfaces (like granite, quartz, or hardened metal). This translates to:​Mirror-like finishes: The diamond grains refine surfaces to a smooth, reflective shine, eliminating dullness or unevenness.​Longer service life: Up to 2-3 times more durable than non-diamond polishing discs, reducing replacement frequency and project costs.​Consistent performance: No “drop-off” in polishing quality mid-project—each use delivers the same high standard as the first.​4-Inch Size: Precision for Small & Detailed Surfaces​The compact 4-inch diameter is designed for maneuverability, making it…