With polyester/cotton backing material, Models XXL Z3 and compact Z3 offer edge and angled work surface options. Available in type 27 or 29 shapes with either 7/8- or 5/8–11 in. arbor holes, XXL Z3 line of flap discs consists of 12 discs in 4½ in. dia and 40, 60, and 80 grit sizes. With flaps compressed at 4 deg, compact Z3 line of flap discs includes 6 discs and comes in 4½ in. dia, 40–80 grit sizes, and 7/8- or 5/8–11 in. arbor holes.