Task Tools 36 grit aluminum oxide bench grinding wheel is ideal for general grinding of all metals with greater stock removal. Universal nested busing fits bench grinders with the following standard arbors: 1-Inch, 7⁄8-Inch, 3/4-Inch, 5⁄8-Inch, 1/2-Inch. Leaves a coarse finish. Measures 6-Inch by 1-Inch with 1-Inch arbor.