These abrasive sponges are very durable. I tend to spank them and unintentionally abuse them. But they stand up to use and abuse. Ideal for flat surfaces where surface grinding is required. Even better than those sanding blocks. Enjoy.
Pros
Efficient and durable wet and dry pads - available in 3 grits, 80/100/120, 1st of each grist. The sponge is reusable and ideal for those hard-to-reach areas that an electric sander can miss.