BHA Angle Grinder Ribbed Backing Pad for Resin Fiber Disc, 4.5" x 5/8"-11 - Amazon.com
125*22mm Yihong Xlock Fiberglass Backing Plate Fiber Disc as Base of The Flap Disc Making for Angle Grinder - China X-Lock Fiberglass Backing Plate, X-Lock Fibre Discs | Made-in-China.com
4 Best Practices for Fabricators Using Fiber Discs | Norton Abrasives
BHA Zirconia Resin Fiber Sanding and Grinding Discs, 4.5” x 7/8”, 24 Grit - 25 Pack