Pferd 60485 Flap Disc 4-12x5/8-11 36 Grit (Package of 10) Pferd Sale! from 8520 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Flap Disc Z PSF, 4-1/2" x 5/8-11" Threaded arbor hole, Polifan, Extra Steelox, Zirconiax, 36 Grit SKU:PFE 60485