The diamond paper accessory is perfect for removing tough materials such as cement， masonry， stone， plaster and thin-set mortar. Featuring 60-grit diamond abrasive the MM910 is ideal for removing paint or oil stains from driveways， excess mortar from bricks and rust from patio furniture. Preparing the surface for tile replacement is also a common application for this accessory. Requires MM11 or MM14 hook and loop pad accessory.