Amazon.com: LIZMOF Grinding Wheels 4-1/2 x 7/8 Inch for General Purpose Metal & Stainless Steel, Aluminum Oxide Grinding Disc for Angle Grinder, Type 27, 10 PCS : Industrial & Scientific
DIABLO 4-1/2 in. x 1/4 in. x 7/8 in. Metal Grinding Disc with Type 27 Depressed Center DBD045250701F - The Home Depot
Amazon.com: Milwaukee 5 Pack - 4 1 2 Grinding Wheel For Grinders - Aggressive Grinding For Metal & Stainless Steel - 4-1/2" x 1/4 x 7/8-Inch | Depressed : Everything Else
LUCKUT Grinding Wheels Grinding Discs 4-1/2'' x 1/4'' x 7/8'' Grinder Wheel Center Metal Aggressive Grinding for Angle Grinders-5 Pack: Amazon.com: Industrial & Scientific
ACS Diamond Grinding Disc, 4-1/2" Dia. X 5/8"-11 Center Hub Thread, Type 29, 36 Grit » Alloy Coating Supply®