Smooth finish – while grinding fillet welds, the angled flaps reduce the risk of gouging the work-piece Norton 78072748280 3x79 BlueFire R884P Zirconia Alumina Cloth Narrow Backstand Belts, 60 Grit... Tiger angled flap discs deliver an aggressive, long life solution for grinding fillet welds, t-joints and other hard-to-reach places. FLEXIBLE FLAP DISC - Xinyuan Abrasives Aggressive Grinding Disc For Metal WEILER WEI-31357 5" Wolverine Abrasive Flap Disc, Angled, Phenolic Backing, 60Z, 7/8" Hole Angled Flap Disc For Fillet Welds Long life – keeps you grinding longer on steel, stainless, aluminum and other hard-to-grind metals, lowering cost of use 4-1/2″ Tiger Paw Abrasive Flap Disc, Angled, Phenolic Backing, 60Z, 5/8″-11 A.H Flexibility of approach – angled flaps allow the operator to grind atb a higher or lower angle, getting into hard-to-reach places more easily Aggressive grinding – tiger angled attacks metal, removing more material in less time so you get the job done faster