POLIFAN®-Curve Radial Type Flap Disc - 5" x 5/8-11" Thread, 40 Grit Zirconia - for Steel and Stainless Steel (INOX) Grinding - Pack of 1 - Part 67216

Beware! The width is NOT as advertised. I purchased this product, spec'ed to 9/16 inch width. When arrived today, it is marked "9/16" but measures to 3/8 in. This may matter when grinding wider fillet welds.

This is an awesome product for smoothing out welds, fast removal, plus the threaded hole makes it easy to put on and take off of the angle grinder. I highly recommend it.