The NILFISK Disc Brush Magnagrit is designed for aggressive, heavy-duty scrubbing or stripping of floors. These brushes feature large diameter silicone carbide grit impregnated synthetic bristles, which are self-replenishing as the brush wears. They are suitable for use in place of brown pads and are compatible with various Nilfisk Advance models. Depending on the model, two brushes may be required for optimal operation.