eXtra Z3® Zirconia Flap Disc – 4" x 5/8", 40 Grit, Type-29 XL

The eXtra Z3® Zirconia flap disc features 40-grit premium Zirconia Alumina grain bonded to a durable poly/cotton backing, providing aggressive stock removal with controlled finishing. Designed for the fastest stock removal on steel, this disc is ideal for aggressive grinding and heavy-duty applications. The poly/cotton backing delivers durability while maintaining a consistent finish, and the active grinding aid promotes cool cutting with light pressure to reduce heat buildup. Rated for a maximum speed of 15,300 RPM.