Scotch-Brite™ light grinding and blending disc uses a ceramic abrasive grain blend to achieve a high cut-rate for optimal weld grinding and blending in mild-steel applications. in these instances, light grinding and blending discs are designed to effectively blend and refine a grade 36 scratch or finer. Scotch-Brite™ 7000046247 Light Grinding and Blending Disc, GB-DH, Super Duty a Coarse, 5 in x 7/8 in