Pferd Inc.’s Polifan Z SG-Power zirconia alumina flap disc is for work on weld seams, chamfering, surface grinding steel and other applications. Manufactured without the addition of fillers, the new disc is rated for use on stainless steel and steel and reduces vibration, noise and dust levels. It is available in grit sizes 40 and 60 and in conical (Type 29) shape, 4 1/2-in., 5-in. and 7-in. diameters with a 5/8-11 threaded or 7/8-in. plain arbor hole.