Flap Disc – Type 27 Aluminum Oxide 4.5″ x 7/8″ arbor – 36 Grit .

Flap discs offer a new cutting edge as they wear away. Quality aluminum oxide grain paper, mounted on a rugged, light-weight fiberglass backing plate will not damage grinding work. Replaces resin fibre discs offering longer life. Use for metal fabricating, auto body work and grinding welds. No back-up pad required. 13,500 RPM.