947D Flap Discs

3M(TM) Abrasive Type 29 Flap Disc 947D, 4 1/2 in x 7/8 in 80 X weight, 10 per case A premium Cubitron(TM) abrasive grain abrasive product constructed on a X weight, durable cloth backing. Resin bonded for heat resistance. Features grinding aid for cooler grinding. Primary market: metalworking. MOS: 13,300 RPM