Aggressive Grinding – attacks metal, removing more material in less time so you get the job done faster. Long Life – keeps you grinding longer on steel, stainless, aluminum and other hard-to-grind metals, lowering cost of use. Flexibility of Approach – angled flaps allow the operator to grind at a higher or lower angle, getting into hard-to-reach places more easily. Smooth Finish – while grinding fillet welds, the angled flaps reduce the risk of gouging the work-piece.