Flaps offer single-step grinding and blending and may replace grinding wheels and fiber discs Flap construction leaves a smooth finish and resists gouging Zirconia material is ideal for low pressure applications Overlapping layers extend durability for prolonged use in industrial operations Cotton backing resists tearing or fraying Phenolic resin plate provides cushion effect for optimal blending and dampens vibration, reducing operator fatigue and tool wear Constructed for low-pressure cleaning, surface prep, and finishing, our Standard Abrasives Zirconia Flap Disc features extra-sharp alumina zirconia mineral on durable cotton flaps. The overlapping cloth flaps provide extended durability and progressively reveal fresh ceramic mineral for continuous sharp cut as the flaps wear away, leaving a smooth finish.