3M Cubitron II 969F Flap Disc, 5" x 7/8", Type 27, 40 Grit, Ceramic

3M™ Cubitron™ ll Flap Disc 969F is best suited for metal grinding and finishing, thanks to its unique design and fast cutting abrasive material. This disc features a grinding aid, which runs cooler and helps prevent discolouration on metal surfaces. The semi-flexible, Y-weight backing gives each flap excellent strength. These attributes make 3M™ Cubitron™ ll Flap Disc 969F a good match for projects that require an equally durable and versatile abrasive disc. Coated abrasive flap discs are the ideal choice for moderate grinding, blending, beveling, scale removal and finishing on a variety of metals. The abrasive flaps offer a long lasting supply of fresh abrasives in a load resistant design. Though designed for use with a right-angle grinder, the flap disc design allows for creative application to fit whatever job you might have. 

Flap Discs offers versatility and user friendliness . 969F retains that user friendliness, but also delivers speed. The durable polyester backing stands up to the rigours of bevelling reducing dics changeovers. 

 3M has a Value Analysis calculator. You can take information from your production, drop it in there, and it will show you how much you can save on a daily or yearly basis by switching to 3M Cubitron abrasives.  https://www.3m.com/3M/en_US/metalworking-us/resources/time-savings-calculator/