This blue High-Flex polishing wheel from EVE is ideal for smoothing and shaping precious metals with a flex shaft or other rotary tool. The medium abrasive is great for pre-polishing tasks; it smooths and refines edges and surfaces. High-Flex polishers (also known as blues and grays) allow you to be more aggressive with your finishing technique. They also help eliminate drag lines and ridges with flex action that results in better blending. The wheel has a 1/16" center hole; use with a mandrel (available separately).