Designed for precise grinding of fillet welds, this PFERD POLIFAN-CURVE flap disc combines a zirconia abrasive with 40 grit for work on stainless steel and steel. Its high stock-removal rate supports productive grinding, while its long service life and shape help achieve the fillet-weld geometry. The 6-inch disc is compatible with angle grinders and has a 5/8-11 arbor.