SIGNI Aluminum Grinding and Polishing Wheel Set, Grinder Disc Set Includes 2pcs Aluminum Grinding Wheel, 1pc Aluminum Polishing Wheel, 4-1/2" Diameter and 7/8” Arbor, Designed for Aluminum and Copper: Amazon.com: Industrial &
Grinding Disc, Aluminum Grinding wheel - 4-1/2" x 1/4" x 7/8" - T27 - (5 PACK) - Walmart.com