https://www.ebay.com/sch/i.html?_nkw=3M+High+Performance+Depressed+Center+Grinding+Wheel+Pack+Of+20+&_sacat=0&_dmd=2

3M High Performance Depressed Center Grinding Wheel (Pack Of 20)

Regular price
$271.00
Sale price
$190.00

Depressed Center Grinding Wheel, Abrasive Wheel Type Type 27, Abrasive Wheel Diameter 9 In, Thickness 1/4 In, Arbor Hole Size 7/8 In, Abrasive Material Ceramic, Abrasive Grit 36, Max. RPM 6650, Series High Performance, Grade Very Coarse, Application Ferrous Metal, Stainless, Aluminum