For aggressive stock removal on a variety of welds, coatings and other metal fabrication applications. The overlapping coated abrasive cloth flaps on 3M™ Flap Discs provide several layers of abrasives, making the disc very durable. The 3M™ Flap Disc 577F is a versatile product that delivers a fast cut, long life, and a smooth finish. Performance and price make these discs a great value and the flap design allows one disc to perform both the grinding and blending steps. Additionally, the economic alumina zirconia mineral is ideal for lowering abrasive costs on both mild and stainless steel applications. For those really big jobs, try the 3M™ Giant Flap Disc 577F, with 25 percent more thickness than the standard 3M™ Flap Disc 577F, for aggressive cut and durability.