4-1/2in Big Cat Abrasive Flap Disc, Flat, Phenolic Backing, 40Z, 5/8in-11 UNC Nut 10ct

A thicker disc with larger flaps which conforms to curved and irregulars surfaces, resulting in a consistent finish. Flap design results in 30-40 percent longer life than standard flap discs. Thicker phenolic back provides more stability for the thicker cloth configuration. Contaminant-free (contains less than 0. 1% Fe, S, Cl). Self-sharpening zirconia alumina (ZA) grains hold up under high temperatures and extreme pressure. 5/8" - 11 metal nut allows for quick spin-on, spin-off changeover and eliminates cross-threading or sticking to spindle due to heat build-up. Best on carbon steel, structural steel, stainless steel, and cast iron.