Standard Abrasives Surface Conditioning Flap Disc 821210, 4-1/2 in x 7/8 in MED, 5 per case Suitable for a variety of substrates, the Standard Abrasives Surface Conditioning Flap Disc effectively blends, deburrs and finishes in one stepIt can also be used for light grindingThe overlapping flaps provide several layers of abrasives for increased durability and enhanced cut rateThe versatility of the Surface Conditioning Flap Disc makes it a handy standby in any workshop. Product Information Brand 3M Part # 7000121834 Origin Country Belgium Product Type Flap Discs Product InformationConstructed for long life, flexibility, heat-resistance and load-resistanceExcellent choice for aluminum, steel and titanium substratesMade with aluminum oxide for fast cut rate and long lifeNon-woven flaps combine deburring, blending and finishing into one step for greater efficiencyOpen web responds to surface irregularities and minimizes gouging of the partOverlapping flaps increase durability and enhance cut ratePhenolic resin plate provides cushion effect for optimal blending and dampens vibration, reducing operator fatigue and tool wear