Get an professional finish with top-of-the-line sanding blocks from Dura-Block. Great for wet or dry sanding, the blocks are made from patented closed-cell EVA rubber. They are sized and shaped to create flawlessly flat surfaces and/or detailed contours without ripples or gouging. The AF4416: -Uses 6” hook and loop sand paper discs of your choice. -Can be used wet or dry. -Can be used flat, on edge or on the curved contour.