3M Diamond Hand Lap 6200J manual sanding sponges with diamond mineral make it possible to sand even hard, difficult-to-work materials. The nickel binder is characterized by high performance and a long service life. The sponges are suitable for wet and dry sanding and finishing on many materials, including hardened cast iron, granite, carbide, composites, non-ferrous metals, thermal spray coatings, and exotic alloys. They are available in a wide range of grits, so you can choose according to the specific needs of your work.