Features Long life, superior performance No backing pad required . Type: Flap. Diameter: 125 mm. Abrasive material: Zirconia. Grit grade: 40. Speed rating: 12000 rpm. Arbour hole size: 22 mm. Feature: Long life, superior performance. No backing pad required.. Application: Suitable for use with portable angle grinders and sanders, on stainless steel and carbon steel. Ideal for grinding and finishing..