3M™ Flap Disc 577F features fast cutting alumina zirconia mineral on durable polyester backed flaps. Our 577F discs give extra cutting power and longevity in heavy duty applications such as weld removal, sharp-edge work, and bevelling.Use 3M™ Flap Disc 577F to tackle the toughest high-pressure metalworking applications and leaves a blended finish, all i