Flap Discs 4-1/2" x 7/8" 60 Grit 60 Pack Grinding Zirconia

4.5 inch diameter, 7/8 inch arbor (60 per order) 60 grit long lasting zirconium oxide abrasive for steel and most other metals Type 29 (depressed center with angled abrasive surface) 13,300 RPM max tool speed MPA-Hannover and EN 12413 quality certifications