3M Scotch Brite Roloc Bristle discs are a roll-on surface conditioning disc meant for stripping,deburring, finishing, polishing , cleaning, and coating removal. They come in 2" diameters and different grits depending on the desired result. 3M's Ceramic Abrasive Grain provides high durability and finish qualtity and the flexible bristles move with the contour of the surface. They are easily changed by unscrewing and screwing in a new one.