3M Roloc Bristle Discs - RD-ZB * One piece moulded construction impregnated with 3MTM CubitronTM Mineral which gives a consistent cleaning action throughout its life. * Compared to wire brushes, the Bristle Disc construction eliminates the risk of flying wires and minimal pressure is required, making the product extremely easy and comfortable to use. * The open bristle construction is more conformable than Clean & Strip with no loading. 3MTM CubitronTM Mineral Stainless Steel Mild Steel Aluminium Medium Pressure