The Scotch-Brite™ Flap Brush is great for a variety of aesthetic finishing applications on wood and metals. Whether primer scuffing and wood defuzzing or removing metal burrs and imperfections, this brush's flaps effectively clean up the workpiece while still delivering a consistent finish. This brush's open, flexible flap construction is soft and pliable to produce uniform surface finishes without chatter marks. Flaps are secured to a fibre core and repeatedly lap the substrate's surface, and as they do that, they brush and finish areas that may have been passed over by more rigid abrasives — striking a balance between strength and finesse.Scotch-Brite Flap Brushes are offered in a variety of minerals, grades, and densities. This particular brush features a Roloc+ Attachment System, which makes attachment to a die grinder swift and efficient and eliminates the need for attachment accessories and tools. Scotch-Brite Flap Brushes are available in varying grades of silicon carbide and aluminum oxide mineral. Silicon carbide is a synthetic mineral that's very hard and sharp. It breaks down faster than aluminum oxide but delivers a finer finish. Conversely, aluminum oxide is very durable and lasts longer but leaves a coarser finish than silicon carbide grade for grade.